diff --git a/CHANGELOG.md b/CHANGELOG.md
index cf868054cee..e50e059a663 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -36,6 +36,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - No mapping between side object element and context menu in some attributes (<https://github.com/opencv/cvat/pull/1923>)
 - Interpolated shapes exported as `keyframe = True` (<https://github.com/opencv/cvat/pull/1937>)
 - Stylelint filetype scans (<https://github.com/opencv/cvat/pull/1952>)
+- Fixed toolip closing issue (<https://github.com/opencv/cvat/pull/1955>)
 
 ### Security
 -
diff --git a/cvat-ui/package-lock.json b/cvat-ui/package-lock.json
index 26e0217c3ae..f6ff3fd89d7 100644
--- a/cvat-ui/package-lock.json
+++ b/cvat-ui/package-lock.json
@@ -1,6 +1,6 @@
 {
   "name": "cvat-ui",
-  "version": "1.6.4",
+  "version": "1.6.5",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
diff --git a/cvat-ui/package.json b/cvat-ui/package.json
index add2deab7ed..922033dbac3 100644
--- a/cvat-ui/package.json
+++ b/cvat-ui/package.json
@@ -1,6 +1,6 @@
 {
   "name": "cvat-ui",
-  "version": "1.6.4",
+  "version": "1.6.5",
   "description": "CVAT single-page application",
   "main": "src/index.tsx",
   "scripts": {
diff --git a/cvat-ui/src/components/annotation-page/annotations-filters-input.tsx b/cvat-ui/src/components/annotation-page/annotations-filters-input.tsx
index f2ddbac945b..f11893dbf5e 100644
--- a/cvat-ui/src/components/annotation-page/annotations-filters-input.tsx
+++ b/cvat-ui/src/components/annotation-page/annotations-filters-input.tsx
@@ -147,7 +147,7 @@ function AnnotationsFiltersInput(props: StateToProps & DispatchToProps): JSX.Ele
             placeholder={
                 underCursor ? (
                     <>
-                        <Tooltip title='Click to open help'>
+                        <Tooltip title='Click to open help' mouseLeaveDelay={0}>
                             <Icon
                                 type='filter'
                                 onClick={(e: React.MouseEvent) => {
diff --git a/cvat-ui/src/components/annotation-page/attribute-annotation-workspace/attribute-annotation-sidebar/attribute-switcher.tsx b/cvat-ui/src/components/annotation-page/attribute-annotation-workspace/attribute-annotation-sidebar/attribute-switcher.tsx
index da835b60851..23675d0b255 100644
--- a/cvat-ui/src/components/annotation-page/attribute-annotation-workspace/attribute-annotation-sidebar/attribute-switcher.tsx
+++ b/cvat-ui/src/components/annotation-page/attribute-annotation-workspace/attribute-annotation-sidebar/attribute-switcher.tsx
@@ -28,16 +28,16 @@ function AttributeSwitcher(props: Props): JSX.Element {
     const title = `${currentAttribute} [${currentIndex + 1}/${attributesCount}]`;
     return (
         <div className='attribute-annotation-sidebar-switcher'>
-            <Tooltip title={`Previous attribute ${normalizedKeyMap.PREVIOUS_ATTRIBUTE}`}>
+            <Tooltip title={`Previous attribute ${normalizedKeyMap.PREVIOUS_ATTRIBUTE}`} mouseLeaveDelay={0}>
                 <Button disabled={attributesCount <= 1} onClick={() => nextAttribute(-1)}>
                     <Icon type='left' />
                 </Button>
             </Tooltip>
-            <Tooltip title={title}>
+            <Tooltip title={title} mouseLeaveDelay={0}>
                 <Text className='cvat-text'>{currentAttribute}</Text>
                 <Text strong>{` [${currentIndex + 1}/${attributesCount}]`}</Text>
             </Tooltip>
-            <Tooltip title={`Next attribute ${normalizedKeyMap.NEXT_ATTRIBUTE}`}>
+            <Tooltip title={`Next attribute ${normalizedKeyMap.NEXT_ATTRIBUTE}`} mouseLeaveDelay={0}>
                 <Button disabled={attributesCount <= 1} onClick={() => nextAttribute(1)}>
                     <Icon type='right' />
                 </Button>
diff --git a/cvat-ui/src/components/annotation-page/attribute-annotation-workspace/attribute-annotation-sidebar/object-switcher.tsx b/cvat-ui/src/components/annotation-page/attribute-annotation-workspace/attribute-annotation-sidebar/object-switcher.tsx
index 97e77d0b6ec..a6a92a56782 100644
--- a/cvat-ui/src/components/annotation-page/attribute-annotation-workspace/attribute-annotation-sidebar/object-switcher.tsx
+++ b/cvat-ui/src/components/annotation-page/attribute-annotation-workspace/attribute-annotation-sidebar/object-switcher.tsx
@@ -32,17 +32,17 @@ function ObjectSwitcher(props: Props): JSX.Element {
     const title = `${currentLabel} ${clientID} [${currentIndex + 1}/${objectsCount}]`;
     return (
         <div className='attribute-annotation-sidebar-switcher'>
-            <Tooltip title={`Previous object ${normalizedKeyMap.PREVIOUS_OBJECT}`}>
+            <Tooltip title={`Previous object ${normalizedKeyMap.PREVIOUS_OBJECT}`} mouseLeaveDelay={0}>
                 <Button disabled={objectsCount <= 1} onClick={() => nextObject(-1)}>
                     <Icon type='left' />
                 </Button>
             </Tooltip>
-            <Tooltip title={title}>
+            <Tooltip title={title} mouseLeaveDelay={0}>
                 <Text className='cvat-text'>{currentLabel}</Text>
                 <Text className='cvat-text'>{` ${clientID} `}</Text>
                 <Text strong>{`[${currentIndex + 1}/${objectsCount}]`}</Text>
             </Tooltip>
-            <Tooltip title={`Next object ${normalizedKeyMap.NEXT_OBJECT}`}>
+            <Tooltip title={`Next object ${normalizedKeyMap.NEXT_OBJECT}`} mouseLeaveDelay={0}>
                 <Button disabled={objectsCount <= 1} onClick={() => nextObject(1)}>
                     <Icon type='right' />
                 </Button>
diff --git a/cvat-ui/src/components/annotation-page/standard-workspace/canvas-point-context-menu.tsx b/cvat-ui/src/components/annotation-page/standard-workspace/canvas-point-context-menu.tsx
index 2e782a4f40e..9d6f56c0546 100644
--- a/cvat-ui/src/components/annotation-page/standard-workspace/canvas-point-context-menu.tsx
+++ b/cvat-ui/src/components/annotation-page/standard-workspace/canvas-point-context-menu.tsx
@@ -111,7 +111,7 @@ function CanvasPointContextMenu(props: Props): React.ReactPortal | null {
     return visible && contextMenuFor && type === ContextMenuType.CANVAS_SHAPE_POINT
         ? (ReactDOM.createPortal(
             <div className='cvat-canvas-point-context-menu' style={{ top, left }}>
-                <Tooltip title='Delete point [Ctrl + dblclick]'>
+                <Tooltip title='Delete point [Ctrl + dblclick]' mouseLeaveDelay={0}>
                     <Button type='link' icon='delete' onClick={onPointDelete}>
                         Delete point
                     </Button>
diff --git a/cvat-ui/src/components/annotation-page/standard-workspace/canvas-wrapper.tsx b/cvat-ui/src/components/annotation-page/standard-workspace/canvas-wrapper.tsx
index b10cd3d6bfe..14a13014e76 100644
--- a/cvat-ui/src/components/annotation-page/standard-workspace/canvas-wrapper.tsx
+++ b/cvat-ui/src/components/annotation-page/standard-workspace/canvas-wrapper.tsx
@@ -876,7 +876,7 @@ export default class CanvasWrapperComponent extends React.PureComponent<Props> {
                         defaultValue={0}
                         onChange={(value: SliderValue): void => onSwitchZLayer(value as number)}
                     />
-                    <Tooltip title={`Add new layer ${maxZLayer + 1} and switch to it`}>
+                    <Tooltip title={`Add new layer ${maxZLayer + 1} and switch to it`} mouseLeaveDelay={0}>
                         <Icon type='plus-circle' onClick={onAddZLayer} />
                     </Tooltip>
                 </div>
diff --git a/cvat-ui/src/components/annotation-page/standard-workspace/controls-side-bar/cursor-control.tsx b/cvat-ui/src/components/annotation-page/standard-workspace/controls-side-bar/cursor-control.tsx
index 0222008d927..e4f0ec15b8b 100644
--- a/cvat-ui/src/components/annotation-page/standard-workspace/controls-side-bar/cursor-control.tsx
+++ b/cvat-ui/src/components/annotation-page/standard-workspace/controls-side-bar/cursor-control.tsx
@@ -24,7 +24,7 @@ function CursorControl(props: Props): JSX.Element {
     } = props;
 
     return (
-        <Tooltip title={`Cursor ${cursorShortkey}`} placement='right'>
+        <Tooltip title={`Cursor ${cursorShortkey}`} placement='right' mouseLeaveDelay={0}>
             <Icon
                 component={CursorIcon}
                 className={activeControl === ActiveControl.CURSOR
diff --git a/cvat-ui/src/components/annotation-page/standard-workspace/controls-side-bar/dextr-plugin.tsx b/cvat-ui/src/components/annotation-page/standard-workspace/controls-side-bar/dextr-plugin.tsx
index 275289e3b12..e4ce504364a 100644
--- a/cvat-ui/src/components/annotation-page/standard-workspace/controls-side-bar/dextr-plugin.tsx
+++ b/cvat-ui/src/components/annotation-page/standard-workspace/controls-side-bar/dextr-plugin.tsx
@@ -62,7 +62,7 @@ function DEXTRPlugin(props: StateToProps & DispatchToProps): JSX.Element | null
 
     return (
         pluginEnabled ? (
-            <Tooltip title='Make AI polygon from at least 4 extreme points using deep extreme cut'>
+            <Tooltip title='Make AI polygon from at least 4 extreme points using deep extreme cut' mouseLeaveDelay={0}>
                 <Checkbox
                     style={{ marginTop: 5 }}
                     checked={pluginActivated}
diff --git a/cvat-ui/src/components/annotation-page/standard-workspace/controls-side-bar/draw-shape-popover.tsx b/cvat-ui/src/components/annotation-page/standard-workspace/controls-side-bar/draw-shape-popover.tsx
index 070a0c84139..5edfc758735 100644
--- a/cvat-ui/src/components/annotation-page/standard-workspace/controls-side-bar/draw-shape-popover.tsx
+++ b/cvat-ui/src/components/annotation-page/standard-workspace/controls-side-bar/draw-shape-popover.tsx
@@ -186,14 +186,14 @@ function DrawShapePopoverComponent(props: Props): JSX.Element {
             }
             <Row type='flex' justify='space-around'>
                 <Col span={12}>
-                    <Tooltip title={`Press ${repeatShapeShortcut} to draw again`}>
+                    <Tooltip title={`Press ${repeatShapeShortcut} to draw again`} mouseLeaveDelay={0}>
                         <Button onClick={onDrawShape}>
                             Shape
                         </Button>
                     </Tooltip>
                 </Col>
                 <Col span={12}>
-                    <Tooltip title={`Press ${repeatShapeShortcut} to draw again`}>
+                    <Tooltip title={`Press ${repeatShapeShortcut} to draw again`} mouseLeaveDelay={0}>
                         <Button onClick={onDrawTrack}>
                             Track
                         </Button>
diff --git a/cvat-ui/src/components/annotation-page/standard-workspace/controls-side-bar/fit-control.tsx b/cvat-ui/src/components/annotation-page/standard-workspace/controls-side-bar/fit-control.tsx
index 4de7cfc48da..0ad4e788455 100644
--- a/cvat-ui/src/components/annotation-page/standard-workspace/controls-side-bar/fit-control.tsx
+++ b/cvat-ui/src/components/annotation-page/standard-workspace/controls-side-bar/fit-control.tsx
@@ -19,7 +19,7 @@ function FitControl(props: Props): JSX.Element {
     } = props;
 
     return (
-        <Tooltip title='Fit the image [Double Click]' placement='right'>
+        <Tooltip title='Fit the image [Double Click]' placement='right' mouseLeaveDelay={0}>
             <Icon component={FitIcon} onClick={(): void => canvasInstance.fit()} />
         </Tooltip>
     );
diff --git a/cvat-ui/src/components/annotation-page/standard-workspace/controls-side-bar/group-control.tsx b/cvat-ui/src/components/annotation-page/standard-workspace/controls-side-bar/group-control.tsx
index 968b4b3feb1..15cf9be125c 100644
--- a/cvat-ui/src/components/annotation-page/standard-workspace/controls-side-bar/group-control.tsx
+++ b/cvat-ui/src/components/annotation-page/standard-workspace/controls-side-bar/group-control.tsx
@@ -45,7 +45,7 @@ function GroupControl(props: Props): JSX.Element {
     const title = `Group shapes/tracks ${switchGroupShortcut}.`
         + ` Select and press ${resetGroupShortcut} to reset a group`;
     return (
-        <Tooltip title={title} placement='right'>
+        <Tooltip title={title} placement='right' mouseLeaveDelay={0}>
             <Icon {...dynamicIconProps} component={GroupIcon} />
         </Tooltip>
     );
diff --git a/cvat-ui/src/components/annotation-page/standard-workspace/controls-side-bar/merge-control.tsx b/cvat-ui/src/components/annotation-page/standard-workspace/controls-side-bar/merge-control.tsx
index c70a90c0d73..2ac9f432991 100644
--- a/cvat-ui/src/components/annotation-page/standard-workspace/controls-side-bar/merge-control.tsx
+++ b/cvat-ui/src/components/annotation-page/standard-workspace/controls-side-bar/merge-control.tsx
@@ -41,7 +41,7 @@ function MergeControl(props: Props): JSX.Element {
         };
 
     return (
-        <Tooltip title={`Merge shapes/tracks ${switchMergeShortcut}`} placement='right'>
+        <Tooltip title={`Merge shapes/tracks ${switchMergeShortcut}`} placement='right' mouseLeaveDelay={0}>
             <Icon {...dynamicIconProps} component={MergeIcon} />
         </Tooltip>
     );
diff --git a/cvat-ui/src/components/annotation-page/standard-workspace/controls-side-bar/move-control.tsx b/cvat-ui/src/components/annotation-page/standard-workspace/controls-side-bar/move-control.tsx
index 3446a5954c6..1a25f2bf589 100644
--- a/cvat-ui/src/components/annotation-page/standard-workspace/controls-side-bar/move-control.tsx
+++ b/cvat-ui/src/components/annotation-page/standard-workspace/controls-side-bar/move-control.tsx
@@ -19,7 +19,7 @@ function MoveControl(props: Props): JSX.Element {
     const { canvasInstance, activeControl } = props;
 
     return (
-        <Tooltip title='Move the image' placement='right'>
+        <Tooltip title='Move the image' placement='right' mouseLeaveDelay={0}>
             <Icon
                 component={MoveIcon}
                 className={activeControl === ActiveControl.DRAG_CANVAS
diff --git a/cvat-ui/src/components/annotation-page/standard-workspace/controls-side-bar/resize-control.tsx b/cvat-ui/src/components/annotation-page/standard-workspace/controls-side-bar/resize-control.tsx
index de5baf14c80..beec7e0234f 100644
--- a/cvat-ui/src/components/annotation-page/standard-workspace/controls-side-bar/resize-control.tsx
+++ b/cvat-ui/src/components/annotation-page/standard-workspace/controls-side-bar/resize-control.tsx
@@ -22,7 +22,7 @@ function ResizeControl(props: Props): JSX.Element {
     } = props;
 
     return (
-        <Tooltip title='Select a region of interest' placement='right'>
+        <Tooltip title='Select a region of interest' placement='right' mouseLeaveDelay={0}>
             <Icon
                 component={ZoomIcon}
                 className={activeControl === ActiveControl.ZOOM_CANVAS
diff --git a/cvat-ui/src/components/annotation-page/standard-workspace/controls-side-bar/rotate-control.tsx b/cvat-ui/src/components/annotation-page/standard-workspace/controls-side-bar/rotate-control.tsx
index df9d4c159ad..e5aa86910f8 100644
--- a/cvat-ui/src/components/annotation-page/standard-workspace/controls-side-bar/rotate-control.tsx
+++ b/cvat-ui/src/components/annotation-page/standard-workspace/controls-side-bar/rotate-control.tsx
@@ -29,14 +29,14 @@ function RotateControl(props: Props): JSX.Element {
             placement='right'
             content={(
                 <>
-                    <Tooltip title={`Rotate the image anticlockwise ${anticlockwiseShortcut}`} placement='topRight'>
+                    <Tooltip title={`Rotate the image anticlockwise ${anticlockwiseShortcut}`} placement='topRight' mouseLeaveDelay={0}>
                         <Icon
                             className='cvat-rotate-canvas-controls-left'
                             onClick={(): void => rotateFrame(Rotation.ANTICLOCKWISE90)}
                             component={RotateIcon}
                         />
                     </Tooltip>
-                    <Tooltip title={`Rotate the image clockwise ${clockwiseShortcut}`} placement='topRight'>
+                    <Tooltip title={`Rotate the image clockwise ${clockwiseShortcut}`} placement='topRight' mouseLeaveDelay={0}>
                         <Icon
                             className='cvat-rotate-canvas-controls-right'
                             onClick={(): void => rotateFrame(Rotation.CLOCKWISE90)}
diff --git a/cvat-ui/src/components/annotation-page/standard-workspace/controls-side-bar/setup-tag-popover.tsx b/cvat-ui/src/components/annotation-page/standard-workspace/controls-side-bar/setup-tag-popover.tsx
index 3366079d0a9..11c1c1f60f9 100644
--- a/cvat-ui/src/components/annotation-page/standard-workspace/controls-side-bar/setup-tag-popover.tsx
+++ b/cvat-ui/src/components/annotation-page/standard-workspace/controls-side-bar/setup-tag-popover.tsx
@@ -61,7 +61,7 @@ function SetupTagPopover(props: Props): JSX.Element {
             </Row>
             <Row type='flex' justify='space-around'>
                 <Col span={24}>
-                    <Tooltip title={`Press ${repeatShapeShortcut} to add a tag again`}>
+                    <Tooltip title={`Press ${repeatShapeShortcut} to add a tag again`} mouseLeaveDelay={0}>
                         <Button onClick={() => onSetup(selectedLabeID)}>
                             Tag
                         </Button>
diff --git a/cvat-ui/src/components/annotation-page/standard-workspace/controls-side-bar/split-control.tsx b/cvat-ui/src/components/annotation-page/standard-workspace/controls-side-bar/split-control.tsx
index 7624e6f0b26..e700d2873cd 100644
--- a/cvat-ui/src/components/annotation-page/standard-workspace/controls-side-bar/split-control.tsx
+++ b/cvat-ui/src/components/annotation-page/standard-workspace/controls-side-bar/split-control.tsx
@@ -41,7 +41,7 @@ function SplitControl(props: Props): JSX.Element {
         };
 
     return (
-        <Tooltip title={`Split a track ${switchSplitShortcut}`} placement='right'>
+        <Tooltip title={`Split a track ${switchSplitShortcut}`} placement='right' mouseLeaveDelay={0}>
             <Icon {...dynamicIconProps} component={SplitIcon} />
         </Tooltip>
     );
diff --git a/cvat-ui/src/components/annotation-page/standard-workspace/objects-side-bar/object-item-basics.tsx b/cvat-ui/src/components/annotation-page/standard-workspace/objects-side-bar/object-item-basics.tsx
index 08536f877ed..99a243b8f78 100644
--- a/cvat-ui/src/components/annotation-page/standard-workspace/objects-side-bar/object-item-basics.tsx
+++ b/cvat-ui/src/components/annotation-page/standard-workspace/objects-side-bar/object-item-basics.tsx
@@ -74,7 +74,7 @@ function ItemTopComponent(props: Props): JSX.Element {
                 <Text type='secondary' style={{ fontSize: 10 }}>{type}</Text>
             </Col>
             <Col span={12}>
-                <Tooltip title='Change current label'>
+                <Tooltip title='Change current label' mouseLeaveDelay={0}>
                     <Select
                         size='small'
                         value={`${labelID}`}
diff --git a/cvat-ui/src/components/annotation-page/standard-workspace/objects-side-bar/object-item-buttons.tsx b/cvat-ui/src/components/annotation-page/standard-workspace/objects-side-bar/object-item-buttons.tsx
index e7d2f3c03b8..f5c12697155 100644
--- a/cvat-ui/src/components/annotation-page/standard-workspace/objects-side-bar/object-item-buttons.tsx
+++ b/cvat-ui/src/components/annotation-page/standard-workspace/objects-side-bar/object-item-buttons.tsx
@@ -113,7 +113,7 @@ function ItemButtonsComponent(props: Props): JSX.Element {
                         <Col>
                             { navigatePrevKeyframe
                                 ? (
-                                    <Tooltip title={`Go to previous keyframe ${prevKeyFrameShortcut}`}>
+                                    <Tooltip title={`Go to previous keyframe ${prevKeyFrameShortcut}`} mouseLeaveDelay={0}>
                                         <Icon
                                             component={PreviousIcon}
                                             onClick={navigatePrevKeyframe}
@@ -125,7 +125,7 @@ function ItemButtonsComponent(props: Props): JSX.Element {
                         <Col>
                             { navigateNextKeyframe
                                 ? (
-                                    <Tooltip title={`Go to next keyframe ${nextKeyFrameShortcut}`}>
+                                    <Tooltip title={`Go to next keyframe ${nextKeyFrameShortcut}`} mouseLeaveDelay={0}>
                                         <Icon
                                             component={NextIcon}
                                             onClick={navigateNextKeyframe}
@@ -142,7 +142,7 @@ function ItemButtonsComponent(props: Props): JSX.Element {
                     </Row>
                     <Row type='flex' justify='space-around'>
                         <Col>
-                            <Tooltip title={`Switch outside property ${switchOutsideShortcut}`}>
+                            <Tooltip title={`Switch outside property ${switchOutsideShortcut}`} mouseLeaveDelay={0}>
                                 { outside
                                     ? (
                                         <Icon
@@ -155,28 +155,28 @@ function ItemButtonsComponent(props: Props): JSX.Element {
                             </Tooltip>
                         </Col>
                         <Col>
-                            <Tooltip title={`Switch lock property ${switchLockShortcut}`}>
+                            <Tooltip title={`Switch lock property ${switchLockShortcut}`} mouseLeaveDelay={0}>
                                 { locked
                                     ? <Icon type='lock' theme='filled' onClick={unlock} />
                                     : <Icon type='unlock' onClick={lock} />}
                             </Tooltip>
                         </Col>
                         <Col>
-                            <Tooltip title={`Switch occluded property ${switchOccludedShortcut}`}>
+                            <Tooltip title={`Switch occluded property ${switchOccludedShortcut}`} mouseLeaveDelay={0}>
                                 { occluded
                                     ? <Icon type='team' onClick={unsetOccluded} />
                                     : <Icon type='user' onClick={setOccluded} />}
                             </Tooltip>
                         </Col>
                         <Col>
-                            <Tooltip title={`Switch hidden property ${switchHiddenShortcut}`}>
+                            <Tooltip title={`Switch hidden property ${switchHiddenShortcut}`} mouseLeaveDelay={0}>
                                 { hidden
                                     ? <Icon type='eye-invisible' theme='filled' onClick={show} style={hiddenStyle} />
                                     : <Icon type='eye' onClick={hide} style={hiddenStyle} />}
                             </Tooltip>
                         </Col>
                         <Col>
-                            <Tooltip title={`Switch keyframe property ${switchKeyFrameShortcut}`}>
+                            <Tooltip title={`Switch keyframe property ${switchKeyFrameShortcut}`} mouseLeaveDelay={0}>
                                 { keyframe
                                     ? <Icon type='star' theme='filled' onClick={unsetKeyframe} style={keyframeStyle} />
                                     : <Icon type='star' onClick={setKeyframe} style={keyframeStyle} />}
@@ -185,7 +185,7 @@ function ItemButtonsComponent(props: Props): JSX.Element {
                         {
                             shapeType !== ShapeType.POINTS && (
                                 <Col>
-                                    <Tooltip title='Switch pinned property'>
+                                    <Tooltip title='Switch pinned property' mouseLeaveDelay={0}>
                                         { pinned
                                             ? <Icon type='pushpin' theme='filled' onClick={unpin} />
                                             : <Icon type='pushpin' onClick={pin} />}
@@ -205,7 +205,7 @@ function ItemButtonsComponent(props: Props): JSX.Element {
                 <Col span={20} style={{ textAlign: 'center' }}>
                     <Row type='flex' justify='space-around'>
                         <Col>
-                            <Tooltip title={`Switch lock property ${switchLockShortcut}`}>
+                            <Tooltip title={`Switch lock property ${switchLockShortcut}`} mouseLeaveDelay={0}>
                                 { locked
                                     ? <Icon type='lock' onClick={unlock} theme='filled' />
                                     : <Icon type='unlock' onClick={lock} />}
@@ -222,21 +222,21 @@ function ItemButtonsComponent(props: Props): JSX.Element {
             <Col span={20} style={{ textAlign: 'center' }}>
                 <Row type='flex' justify='space-around'>
                     <Col>
-                        <Tooltip title={`Switch lock property ${switchLockShortcut}`}>
+                        <Tooltip title={`Switch lock property ${switchLockShortcut}`} mouseLeaveDelay={0}>
                             { locked
                                 ? <Icon type='lock' onClick={unlock} theme='filled' />
                                 : <Icon type='unlock' onClick={lock} />}
                         </Tooltip>
                     </Col>
                     <Col>
-                        <Tooltip title={`Switch occluded property ${switchOccludedShortcut}`}>
+                        <Tooltip title={`Switch occluded property ${switchOccludedShortcut}`} mouseLeaveDelay={0}>
                             { occluded
                                 ? <Icon type='team' onClick={unsetOccluded} />
                                 : <Icon type='user' onClick={setOccluded} />}
                         </Tooltip>
                     </Col>
                     <Col>
-                        <Tooltip title={`Switch hidden property ${switchHiddenShortcut}`}>
+                        <Tooltip title={`Switch hidden property ${switchHiddenShortcut}`} mouseLeaveDelay={0}>
                             { hidden
                                 ? <Icon type='eye-invisible' onClick={show} />
                                 : <Icon type='eye' onClick={hide} />}
@@ -245,7 +245,7 @@ function ItemButtonsComponent(props: Props): JSX.Element {
                     {
                         shapeType !== ShapeType.POINTS && (
                             <Col>
-                                <Tooltip title='Switch pinned property'>
+                                <Tooltip title='Switch pinned property' mouseLeaveDelay={0}>
                                     { pinned
                                         ? <Icon type='pushpin' theme='filled' onClick={unpin} />
                                         : <Icon type='pushpin' onClick={pin} />}
diff --git a/cvat-ui/src/components/annotation-page/standard-workspace/objects-side-bar/object-item-menu.tsx b/cvat-ui/src/components/annotation-page/standard-workspace/objects-side-bar/object-item-menu.tsx
index 23e2c664dc2..454b0826851 100644
--- a/cvat-ui/src/components/annotation-page/standard-workspace/objects-side-bar/object-item-menu.tsx
+++ b/cvat-ui/src/components/annotation-page/standard-workspace/objects-side-bar/object-item-menu.tsx
@@ -63,14 +63,14 @@ export default function ItemMenu(props: Props): JSX.Element {
                 </Button>
             </Menu.Item>
             <Menu.Item>
-                <Tooltip title={`${copyShortcut} and ${pasteShortcut}`}>
+                <Tooltip title={`${copyShortcut} and ${pasteShortcut}`} mouseLeaveDelay={0}>
                     <Button type='link' icon='copy' onClick={copy}>
                         Make a copy
                     </Button>
                 </Tooltip>
             </Menu.Item>
             <Menu.Item>
-                <Tooltip title={`${propagateShortcut}`}>
+                <Tooltip title={`${propagateShortcut}`} mouseLeaveDelay={0}>
                     <Button type='link' icon='block' onClick={propagate}>
                         Propagate
                     </Button>
@@ -93,7 +93,7 @@ export default function ItemMenu(props: Props): JSX.Element {
             )}
             {objectType !== ObjectType.TAG && (
                 <Menu.Item>
-                    <Tooltip title={`${toBackgroundShortcut}`}>
+                    <Tooltip title={`${toBackgroundShortcut}`} mouseLeaveDelay={0}>
                         <Button type='link' onClick={toBackground}>
                             <Icon component={BackgroundIcon} />
                             To background
@@ -103,7 +103,7 @@ export default function ItemMenu(props: Props): JSX.Element {
             )}
             {objectType !== ObjectType.TAG && (
                 <Menu.Item>
-                    <Tooltip title={`${toForegroundShortcut}`}>
+                    <Tooltip title={`${toForegroundShortcut}`} mouseLeaveDelay={0}>
                         <Button type='link' onClick={toForeground}>
                             <Icon component={ForegroundIcon} />
                             To foreground
@@ -112,7 +112,7 @@ export default function ItemMenu(props: Props): JSX.Element {
                 </Menu.Item>
             )}
             <Menu.Item>
-                <Tooltip title={`${removeShortcut}`}>
+                <Tooltip title={`${removeShortcut}`} mouseLeaveDelay={0}>
                     <Button
                         type='link'
                         icon='delete'
diff --git a/cvat-ui/src/components/annotation-page/standard-workspace/objects-side-bar/objects-list-header.tsx b/cvat-ui/src/components/annotation-page/standard-workspace/objects-side-bar/objects-list-header.tsx
index 2aebd92cb0b..4d9879f72bf 100644
--- a/cvat-ui/src/components/annotation-page/standard-workspace/objects-side-bar/objects-list-header.tsx
+++ b/cvat-ui/src/components/annotation-page/standard-workspace/objects-side-bar/objects-list-header.tsx
@@ -95,21 +95,21 @@ function ObjectListHeader(props: Props): JSX.Element {
             </Row>
             <Row type='flex' justify='space-between' align='middle'>
                 <Col span={2}>
-                    <Tooltip title={`Switch lock property for all ${switchLockAllShortcut}`}>
+                    <Tooltip title={`Switch lock property for all ${switchLockAllShortcut}`} mouseLeaveDelay={0}>
                         { statesLocked
                             ? <Icon type='lock' onClick={unlockAllStates} theme='filled' />
                             : <Icon type='unlock' onClick={lockAllStates} />}
                     </Tooltip>
                 </Col>
                 <Col span={2}>
-                    <Tooltip title={`Switch hidden property for all ${switchHiddenAllShortcut}`}>
+                    <Tooltip title={`Switch hidden property for all ${switchHiddenAllShortcut}`} mouseLeaveDelay={0}>
                         { statesHidden
                             ? <Icon type='eye-invisible' onClick={showAllStates} />
                             : <Icon type='eye' onClick={hideAllStates} />}
                     </Tooltip>
                 </Col>
                 <Col span={2}>
-                    <Tooltip title='Expand/collapse all'>
+                    <Tooltip title='Expand/collapse all' mouseLeaveDelay={0}>
                         { statesCollapsed
                             ? <Icon type='caret-down' onClick={expandAllStates} />
                             : <Icon type='caret-up' onClick={collapseAllStates} />}
diff --git a/cvat-ui/src/components/annotation-page/tag-annotation-workspace/tag-annotation-sidebar/shortcuts-select.tsx b/cvat-ui/src/components/annotation-page/tag-annotation-workspace/tag-annotation-sidebar/shortcuts-select.tsx
index 8351a57834e..0955fb3758f 100644
--- a/cvat-ui/src/components/annotation-page/tag-annotation-workspace/tag-annotation-sidebar/shortcuts-select.tsx
+++ b/cvat-ui/src/components/annotation-page/tag-annotation-workspace/tag-annotation-sidebar/shortcuts-select.tsx
@@ -2,7 +2,7 @@
 //
 // SPDX-License-Identifier: MIT
 
-import React, { useState, useEffect, Fragment } from 'react';
+import React, { useState, useEffect } from 'react';
 import { useSelector } from 'react-redux';
 import { GlobalHotKeys, KeyMap } from 'react-hotkeys';
 import { Row, Col } from 'antd/lib/grid';
@@ -86,38 +86,41 @@ const ShortcutsSelect = (props: Props): JSX.Element => {
                     <Text strong>Shortcuts for labels:</Text>
                 </Col>
             </Row>
-            {shift(Object.keys(shortcutLabelMap), 1).slice(0, Math.min(labels.length, 10)).map((id) => (
-                <Row key={id}>
-                    <Col>
-                        <Text strong>{`Key ${id}:`}</Text>
-                        <Select
-                            value={`${shortcutLabelMap[Number.parseInt(id, 10)]}`}
-                            onChange={(value: string) => {
-                                onChangeShortcutLabel(value, Number.parseInt(id, 10));
-                            }}
-                            size='default'
-                            style={{ width: 200 }}
-                            className='cvat-tag-annotation-label-select'
-                        >
-                            <Select.Option value=''>
-                                <Text type='secondary'>
-                                    None
-                                </Text>
-                            </Select.Option>
-                            {
-                                (labels as any[]).map((label: any) => (
-                                    <Select.Option
-                                        key={label.id}
-                                        value={`${label.id}`}
-                                    >
-                                        {label.name}
+            {
+                shift(Object.keys(shortcutLabelMap), 1).slice(0, Math.min(labels.length, 10))
+                    .map((id) => (
+                        <Row key={id}>
+                            <Col>
+                                <Text strong>{`Key ${id}:`}</Text>
+                                <Select
+                                    value={`${shortcutLabelMap[Number.parseInt(id, 10)]}`}
+                                    onChange={(value: string) => {
+                                        onChangeShortcutLabel(value, Number.parseInt(id, 10));
+                                    }}
+                                    size='default'
+                                    style={{ width: 200 }}
+                                    className='cvat-tag-annotation-label-select'
+                                >
+                                    <Select.Option value=''>
+                                        <Text type='secondary'>
+                                            None
+                                        </Text>
                                     </Select.Option>
-                                ))
-                            }
-                        </Select>
-                    </Col>
-                </Row>
-            ))}
+                                    {
+                                        (labels as any[]).map((label: any) => (
+                                            <Select.Option
+                                                key={label.id}
+                                                value={`${label.id}`}
+                                            >
+                                                {label.name}
+                                            </Select.Option>
+                                        ))
+                                    }
+                                </Select>
+                            </Col>
+                        </Row>
+                    ))
+            }
         </div>
     );
 };
diff --git a/cvat-ui/src/components/annotation-page/top-bar/player-buttons.tsx b/cvat-ui/src/components/annotation-page/top-bar/player-buttons.tsx
index 5033c9bed85..2813e729dc2 100644
--- a/cvat-ui/src/components/annotation-page/top-bar/player-buttons.tsx
+++ b/cvat-ui/src/components/annotation-page/top-bar/player-buttons.tsx
@@ -54,19 +54,19 @@ function PlayerButtons(props: Props): JSX.Element {
 
     return (
         <Col className='cvat-player-buttons'>
-            <Tooltip title='Go to the first frame'>
+            <Tooltip title='Go to the first frame' mouseLeaveDelay={0}>
                 <Icon component={FirstIcon} onClick={onFirstFrame} />
             </Tooltip>
-            <Tooltip title={`Go back with a step ${backwardShortcut}`}>
+            <Tooltip title={`Go back with a step ${backwardShortcut}`} mouseLeaveDelay={0}>
                 <Icon component={BackJumpIcon} onClick={onBackward} />
             </Tooltip>
-            <Tooltip title={`Go back ${previousFrameShortcut}`}>
+            <Tooltip title={`Go back ${previousFrameShortcut}`} mouseLeaveDelay={0}>
                 <Icon component={PreviousIcon} onClick={onPrevFrame} />
             </Tooltip>
 
             {!playing
                 ? (
-                    <Tooltip title={`Play ${playPauseShortcut}`}>
+                    <Tooltip title={`Play ${playPauseShortcut}`} mouseLeaveDelay={0}>
                         <Icon
                             component={PlayIcon}
                             onClick={onSwitchPlay}
@@ -74,7 +74,7 @@ function PlayerButtons(props: Props): JSX.Element {
                     </Tooltip>
                 )
                 : (
-                    <Tooltip title={`Pause ${playPauseShortcut}`}>
+                    <Tooltip title={`Pause ${playPauseShortcut}`} mouseLeaveDelay={0}>
                         <Icon
                             component={PauseIcon}
                             onClick={onSwitchPlay}
@@ -82,13 +82,13 @@ function PlayerButtons(props: Props): JSX.Element {
                     </Tooltip>
                 )}
 
-            <Tooltip title={`Go next ${nextFrameShortcut}`}>
+            <Tooltip title={`Go next ${nextFrameShortcut}`} mouseLeaveDelay={0}>
                 <Icon component={NextIcon} onClick={onNextFrame} />
             </Tooltip>
-            <Tooltip title={`Go next with a step ${forwardShortcut}`}>
+            <Tooltip title={`Go next with a step ${forwardShortcut}`} mouseLeaveDelay={0}>
                 <Icon component={ForwardJumpIcon} onClick={onForward} />
             </Tooltip>
-            <Tooltip title='Go to the last frame'>
+            <Tooltip title='Go to the last frame' mouseLeaveDelay={0}>
                 <Icon component={LastIcon} onClick={onLastFrame} />
             </Tooltip>
         </Col>
diff --git a/cvat-ui/src/components/annotation-page/top-bar/player-navigation.tsx b/cvat-ui/src/components/annotation-page/top-bar/player-navigation.tsx
index bf723a77c9e..f536b08185c 100644
--- a/cvat-ui/src/components/annotation-page/top-bar/player-navigation.tsx
+++ b/cvat-ui/src/components/annotation-page/top-bar/player-navigation.tsx
@@ -62,19 +62,19 @@ function PlayerNavigation(props: Props): JSX.Element {
                 </Row>
                 <Row type='flex' justify='center'>
                     <Col className='cvat-player-filename-wrapper'>
-                        <Tooltip title={frameFilename}>
+                        <Tooltip title={frameFilename} mouseLeaveDelay={0}>
                             <Text type='secondary'>{frameFilename}</Text>
                         </Tooltip>
                     </Col>
                     <Col offset={1}>
-                        <Tooltip title='Create frame URL'>
+                        <Tooltip title='Create frame URL' mouseLeaveDelay={0}>
                             <Icon className='cvat-player-frame-url-icon' type='link' onClick={onURLIconClick} />
                         </Tooltip>
                     </Col>
                 </Row>
             </Col>
             <Col>
-                <Tooltip title={`Press ${focusFrameInputShortcut} to focus here`}>
+                <Tooltip title={`Press ${focusFrameInputShortcut} to focus here`} mouseLeaveDelay={0}>
                     <InputNumber
                         className='cvat-player-frame-selector'
                         type='number'
diff --git a/cvat-ui/src/components/annotation-page/top-bar/reid-plugin.tsx b/cvat-ui/src/components/annotation-page/top-bar/reid-plugin.tsx
index d413df158f2..25e41883895 100644
--- a/cvat-ui/src/components/annotation-page/top-bar/reid-plugin.tsx
+++ b/cvat-ui/src/components/annotation-page/top-bar/reid-plugin.tsx
@@ -41,7 +41,7 @@ function InputModal(props: InputModalProps): JSX.Element {
         >
             <Row type='flex'>
                 <Col span={10}>
-                    <Tooltip title='Similarity of objects on neighbour frames is calculated using AI model'>
+                    <Tooltip title='Similarity of objects on neighbour frames is calculated using AI model' mouseLeaveDelay={0}>
                         <Text>Similarity threshold: </Text>
                     </Tooltip>
                 </Col>
@@ -62,7 +62,7 @@ function InputModal(props: InputModalProps): JSX.Element {
             </Row>
             <Row type='flex'>
                 <Col span={10}>
-                    <Tooltip title='The value defines max distance to merge (between centers of two objects on neighbour frames)'>
+                    <Tooltip title='The value defines max distance to merge (between centers of two objects on neighbour frames)' mouseLeaveDelay={0}>
                         <Text>Max pixel distance: </Text>
                     </Tooltip>
                 </Col>
@@ -189,6 +189,8 @@ function ReIDPlugin(props: StateToProps & DispatchToProps): JSX.Element {
                             });
                             await jobInstance.annotations.clear();
                             updateAnnotations(); // one more call to do not confuse canvas
+                            // False positive of no-unsanitized/method
+                            // eslint-disable-next-line no-unsanitized/method
                             await jobInstance.annotations.import(merged);
                             updateAnnotations();
                         } catch (error) {
diff --git a/cvat-ui/src/components/annotation-page/top-bar/right-group.tsx b/cvat-ui/src/components/annotation-page/top-bar/right-group.tsx
index ae7f88329f3..54c7723eb93 100644
--- a/cvat-ui/src/components/annotation-page/top-bar/right-group.tsx
+++ b/cvat-ui/src/components/annotation-page/top-bar/right-group.tsx
@@ -49,7 +49,7 @@ function RightGroup(props: Props): JSX.Element {
                     value={workspace}
                 >
                     {Object.values(Workspace).map((ws) => (
-                        <Select.Option key={ws} value={ws} >
+                        <Select.Option key={ws} value={ws}>
                             {ws}
                         </Select.Option>
                     ))}
diff --git a/cvat-ui/src/components/annotation-page/top-bar/statistics-modal.tsx b/cvat-ui/src/components/annotation-page/top-bar/statistics-modal.tsx
index eb4e379620b..d68d58d9c03 100644
--- a/cvat-ui/src/components/annotation-page/top-bar/statistics-modal.tsx
+++ b/cvat-ui/src/components/annotation-page/top-bar/statistics-modal.tsx
@@ -89,7 +89,7 @@ export default function StatisticsModalComponent(props: Props): JSX.Element {
     });
 
     const makeShapesTracksTitle = (title: string): JSX.Element => (
-        <Tooltip title='Shapes / Tracks'>
+        <Tooltip title='Shapes / Tracks' mouseLeaveDelay={0}>
             <Text strong style={{ marginRight: 5 }}>{title}</Text>
             <Icon className='cvat-info-circle-icon' type='question-circle' />
         </Tooltip>
diff --git a/cvat-ui/src/components/create-model-page/create-model-content.tsx b/cvat-ui/src/components/create-model-page/create-model-content.tsx
index a320b805643..a562bfce327 100644
--- a/cvat-ui/src/components/create-model-page/create-model-content.tsx
+++ b/cvat-ui/src/components/create-model-page/create-model-content.tsx
@@ -18,8 +18,8 @@ import ConnectedFileManager, {
 } from 'containers/file-manager/file-manager';
 import { ModelFiles } from 'reducers/interfaces';
 
-import CreateModelForm, {
-    CreateModelForm as WrappedCreateModelForm,
+import WrappedCreateModelForm, {
+    CreateModelForm,
 } from './create-model-form';
 
 interface Props {
@@ -29,12 +29,12 @@ interface Props {
 }
 
 export default class CreateModelContent extends React.PureComponent<Props> {
-    private modelForm: WrappedCreateModelForm;
+    private modelForm: CreateModelForm;
     private fileManagerContainer: FileManagerContainer;
 
     public constructor(props: Props) {
         super(props);
-        this.modelForm = null as any as WrappedCreateModelForm;
+        this.modelForm = null as any as CreateModelForm;
         this.fileManagerContainer = null as any as FileManagerContainer;
     }
 
@@ -107,7 +107,7 @@ export default class CreateModelContent extends React.PureComponent<Props> {
         return (
             <Row type='flex' justify='start' align='middle' className='cvat-create-model-content'>
                 <Col span={24}>
-                    <Tooltip title='Click to open guide'>
+                    <Tooltip title='Click to open guide' mouseLeaveDelay={0}>
                         <Icon
                             onClick={(): void => {
                                 // false positive
@@ -119,9 +119,9 @@ export default class CreateModelContent extends React.PureComponent<Props> {
                     </Tooltip>
                 </Col>
                 <Col span={24}>
-                    <CreateModelForm
+                    <WrappedCreateModelForm
                         wrappedComponentRef={
-                            (ref: WrappedCreateModelForm): void => {
+                            (ref: CreateModelForm): void => {
                                 this.modelForm = ref;
                             }
                         }
diff --git a/cvat-ui/src/components/create-model-page/create-model-form.tsx b/cvat-ui/src/components/create-model-page/create-model-form.tsx
index e1dbcb33667..004e96458d2 100644
--- a/cvat-ui/src/components/create-model-page/create-model-form.tsx
+++ b/cvat-ui/src/components/create-model-page/create-model-form.tsx
@@ -57,7 +57,7 @@ export class CreateModelForm extends React.PureComponent<Props> {
                     </Col>
                     <Col span={8} offset={2}>
                         <Form.Item>
-                            <Tooltip title='Will this model be availabe for everyone?'>
+                            <Tooltip title='Will this model be availabe for everyone?' mouseLeaveDelay={0}>
                                 { getFieldDecorator('global', {
                                     initialValue: false,
                                     valuePropName: 'checked',
diff --git a/cvat-ui/src/components/create-task-page/advanced-configuration-form.tsx b/cvat-ui/src/components/create-task-page/advanced-configuration-form.tsx
index b038408bf83..a5ed8eae6f6 100644
--- a/cvat-ui/src/components/create-task-page/advanced-configuration-form.tsx
+++ b/cvat-ui/src/components/create-task-page/advanced-configuration-form.tsx
@@ -142,7 +142,7 @@ class AdvancedConfigurationForm extends React.PureComponent<Props> {
 
         return (
             <Form.Item label={<span>Image quality</span>}>
-                <Tooltip title='Defines image quality level'>
+                <Tooltip title='Defines image quality level' mouseLeaveDelay={0}>
                     {form.getFieldDecorator('imageQuality', {
                         initialValue: 70,
                         rules: [{
@@ -168,7 +168,7 @@ class AdvancedConfigurationForm extends React.PureComponent<Props> {
 
         return (
             <Form.Item label={<span>Overlap size</span>}>
-                <Tooltip title='Defines a number of intersected frames between different segments'>
+                <Tooltip title='Defines a number of intersected frames between different segments' mouseLeaveDelay={0}>
                     {form.getFieldDecorator('overlapSize', {
                         rules: [{
                             validator: isNonNegativeInteger,
@@ -186,7 +186,7 @@ class AdvancedConfigurationForm extends React.PureComponent<Props> {
 
         return (
             <Form.Item label={<span>Segment size</span>}>
-                <Tooltip title='Defines a number of frames in a segment'>
+                <Tooltip title='Defines a number of frames in a segment' mouseLeaveDelay={0}>
                     {form.getFieldDecorator('segmentSize', {
                         rules: [{
                             validator: isPositiveInteger,
@@ -403,6 +403,7 @@ class AdvancedConfigurationForm extends React.PureComponent<Props> {
                             More: 1 - 4
                         </>
                     )}
+                    mouseLeaveDelay={0}
                 >
                     {form.getFieldDecorator('dataChunkSize', {
                         rules: [{
diff --git a/cvat-ui/src/components/create-task-page/create-task-content.tsx b/cvat-ui/src/components/create-task-page/create-task-content.tsx
index 2bd32807749..7ee99a6a1e5 100644
--- a/cvat-ui/src/components/create-task-page/create-task-content.tsx
+++ b/cvat-ui/src/components/create-task-page/create-task-content.tsx
@@ -10,7 +10,7 @@ import Collapse from 'antd/lib/collapse';
 import notification from 'antd/lib/notification';
 import Text from 'antd/lib/typography/Text';
 
-import FileManagerContainer from 'containers/file-manager/file-manager';
+import ConnectedFileManager from 'containers/file-manager/file-manager';
 import BasicConfigurationForm, { BaseConfiguration } from './basic-configuration-form';
 import AdvancedConfigurationForm, { AdvancedConfiguration } from './advanced-configuration-form';
 import LabelsEditor from '../labels-editor/labels-editor';
@@ -184,7 +184,7 @@ export default class CreateTaskContent extends React.PureComponent<Props, State>
             <Col span={24}>
                 <Text type='danger'>* </Text>
                 <Text className='cvat-text-color'>Select files:</Text>
-                <FileManagerContainer
+                <ConnectedFileManager
                     ref={
                         (container: any): void => { this.fileManagerContainer = container; }
                     }
diff --git a/cvat-ui/src/components/cvat-app.tsx b/cvat-ui/src/components/cvat-app.tsx
index 9eeecd78509..22dccb88ec6 100644
--- a/cvat-ui/src/components/cvat-app.tsx
+++ b/cvat-ui/src/components/cvat-app.tsx
@@ -189,6 +189,7 @@ class CVATApplication extends React.PureComponent<CVATAppProps & RouteComponentP
                 description: error.length > 200 ? 'Open the Browser Console to get details' : error,
             });
 
+            // eslint-disable-next-line no-console
             console.error(error);
         }
 
diff --git a/cvat-ui/src/components/global-error-boundary/global-error-boundary.tsx b/cvat-ui/src/components/global-error-boundary/global-error-boundary.tsx
index fc8ca195826..9be93aae9ea 100644
--- a/cvat-ui/src/components/global-error-boundary/global-error-boundary.tsx
+++ b/cvat-ui/src/components/global-error-boundary/global-error-boundary.tsx
@@ -153,7 +153,7 @@ class GlobalErrorBoundary extends React.PureComponent<Props, State> {
                             </Paragraph>
                             <ul>
                                 <li>
-                                    <Tooltip title='Copied!' trigger='click'>
+                                    <Tooltip title='Copied!' trigger='click' mouseLeaveDelay={0}>
                                         {/* eslint-disable-next-line */}
                                         <a onClick={() => {copy(message)}}> Copy </a>
                                     </Tooltip>
diff --git a/cvat-ui/src/components/labels-editor/constructor-viewer-item.tsx b/cvat-ui/src/components/labels-editor/constructor-viewer-item.tsx
index a21962e0a9c..67bf793744e 100644
--- a/cvat-ui/src/components/labels-editor/constructor-viewer-item.tsx
+++ b/cvat-ui/src/components/labels-editor/constructor-viewer-item.tsx
@@ -27,7 +27,7 @@ export default function ConstructorViewerItem(props: ConstructorViewerItemProps)
     return (
         <div style={{ background: color }} className='cvat-constructor-viewer-item'>
             <Text>{label.name}</Text>
-            <Tooltip title='Update attributes'>
+            <Tooltip title='Update attributes' mouseLeaveDelay={0}>
                 <span
                     role='button'
                     tabIndex={0}
@@ -39,7 +39,7 @@ export default function ConstructorViewerItem(props: ConstructorViewerItemProps)
             </Tooltip>
             { label.id < 0
                 && (
-                    <Tooltip title='Delete label'>
+                    <Tooltip title='Delete label' mouseLeaveDelay={0}>
                         <span
                             role='button'
                             tabIndex={0}
diff --git a/cvat-ui/src/components/labels-editor/label-form.tsx b/cvat-ui/src/components/labels-editor/label-form.tsx
index b40e0b8a284..469826a4f6c 100644
--- a/cvat-ui/src/components/labels-editor/label-form.tsx
+++ b/cvat-ui/src/components/labels-editor/label-form.tsx
@@ -137,7 +137,7 @@ class LabelForm extends React.PureComponent<Props, {}> {
         return (
             <Col span={4}>
                 <Form.Item>
-                    <Tooltip title='An HTML element representing the attribute'>
+                    <Tooltip title='An HTML element representing the attribute' mouseLeaveDelay={0}>
                         { form.getFieldDecorator(`type[${key}]`, {
                             initialValue: type,
                         })(
@@ -187,7 +187,7 @@ class LabelForm extends React.PureComponent<Props, {}> {
         };
 
         return (
-            <Tooltip title='Press enter to add a new value'>
+            <Tooltip title='Press enter to add a new value' mouseLeaveDelay={0}>
                 <Form.Item>
                     { form.getFieldDecorator(`values[${key}]`, {
                         initialValue: existedValues,
@@ -214,7 +214,7 @@ class LabelForm extends React.PureComponent<Props, {}> {
         const { form } = this.props;
 
         return (
-            <Tooltip title='Specify a default value'>
+            <Tooltip title='Specify a default value' mouseLeaveDelay={0}>
                 <Form.Item>
                     { form.getFieldDecorator(`values[${key}]`, {
                         initialValue: value,
@@ -304,7 +304,7 @@ class LabelForm extends React.PureComponent<Props, {}> {
 
         return (
             <Form.Item>
-                <Tooltip title='Can this attribute be changed frame to frame?'>
+                <Tooltip title='Can this attribute be changed frame to frame?' mouseLeaveDelay={0}>
                     { form.getFieldDecorator(`mutable[${key}]`, {
                         initialValue: value,
                         valuePropName: 'checked',
@@ -321,7 +321,7 @@ class LabelForm extends React.PureComponent<Props, {}> {
 
         return (
             <Form.Item>
-                <Tooltip title='Delete the attribute'>
+                <Tooltip title='Delete the attribute' mouseLeaveDelay={0}>
                     <Button
                         type='link'
                         className='cvat-delete-attribute-button'
@@ -422,7 +422,7 @@ class LabelForm extends React.PureComponent<Props, {}> {
     private renderDoneButton(): JSX.Element {
         return (
             <Col>
-                <Tooltip title='Save the label and return'>
+                <Tooltip title='Save the label and return' mouseLeaveDelay={0}>
                     <Button
                         style={{ width: '150px' }}
                         type='primary'
@@ -445,7 +445,7 @@ class LabelForm extends React.PureComponent<Props, {}> {
             label ? <div />
                 : (
                     <Col offset={1}>
-                        <Tooltip title='Save the label and create one more'>
+                        <Tooltip title='Save the label and create one more' mouseLeaveDelay={0}>
                             <Button
                                 style={{ width: '150px' }}
                                 type='primary'
@@ -467,7 +467,7 @@ class LabelForm extends React.PureComponent<Props, {}> {
 
         return (
             <Col offset={1}>
-                <Tooltip title='Do not save the label and return'>
+                <Tooltip title='Do not save the label and return' mouseLeaveDelay={0}>
                     <Button
                         style={{ width: '150px' }}
                         type='danger'
diff --git a/cvat-ui/src/components/labels-editor/labels-editor.tsx b/cvat-ui/src/components/labels-editor/labels-editor.tsx
index 465c3a679b3..4ade51006e3 100644
--- a/cvat-ui/src/components/labels-editor/labels-editor.tsx
+++ b/cvat-ui/src/components/labels-editor/labels-editor.tsx
@@ -235,7 +235,7 @@ export default class LabelsEditor
                 tabBarStyle={{ marginBottom: '0px' }}
                 tabBarExtraContent={(
                     <>
-                        <Tooltip title='Copied to clipboard!' trigger='click'>
+                        <Tooltip title='Copied to clipboard!' trigger='click' mouseLeaveDelay={0}>
                             <Button
                                 type='link'
                                 icon='copy'
diff --git a/cvat-ui/src/components/labels-editor/raw-viewer.tsx b/cvat-ui/src/components/labels-editor/raw-viewer.tsx
index 532046f42bb..eb798cd2e7e 100644
--- a/cvat-ui/src/components/labels-editor/raw-viewer.tsx
+++ b/cvat-ui/src/components/labels-editor/raw-viewer.tsx
@@ -94,7 +94,7 @@ class RawViewer extends React.PureComponent<Props> {
                 </Form.Item>
                 <Row type='flex' justify='start' align='middle'>
                     <Col>
-                        <Tooltip title='Save labels and return'>
+                        <Tooltip title='Save labels and return' mouseLeaveDelay={0}>
                             <Button
                                 style={{ width: '150px' }}
                                 type='primary'
@@ -105,7 +105,7 @@ class RawViewer extends React.PureComponent<Props> {
                         </Tooltip>
                     </Col>
                     <Col offset={1}>
-                        <Tooltip title='Do not save the label and return'>
+                        <Tooltip title='Do not save the label and return' mouseLeaveDelay={0}>
                             <Button
                                 style={{ width: '150px' }}
                                 type='danger'
diff --git a/cvat-ui/src/components/model-runner-modal/model-runner-modal.tsx b/cvat-ui/src/components/model-runner-modal/model-runner-modal.tsx
index 9b5428a8d7b..99f37094a93 100644
--- a/cvat-ui/src/components/model-runner-modal/model-runner-modal.tsx
+++ b/cvat-ui/src/components/model-runner-modal/model-runner-modal.tsx
@@ -186,7 +186,7 @@ export default class ModelRunnerModalComponent extends React.PureComponent<Props
                     <Tag color={colors[modelLabel]}>{taskLabel}</Tag>
                 </Col>
                 <Col span={1} offset={1}>
-                    <Tooltip title='Remove the mapped values'>
+                    <Tooltip title='Remove the mapped values' mouseLeaveDelay={0}>
                         <Icon
                             className='cvat-run-model-dialog-remove-mapping-icon'
                             type='close-circle'
@@ -288,7 +288,7 @@ export default class ModelRunnerModalComponent extends React.PureComponent<Props
                     )}
                 </Col>
                 <Col span={1} offset={1}>
-                    <Tooltip title='Specify a label mapping between model labels and task labels'>
+                    <Tooltip title='Specify a label mapping between model labels and task labels' mouseLeaveDelay={0}>
                         <Icon className='cvat-info-circle-icon' type='question-circle' />
                     </Tooltip>
                 </Col>
diff --git a/cvat-ui/src/components/task-page/job-list.tsx b/cvat-ui/src/components/task-page/job-list.tsx
index 76d0a48d928..647d72584da 100644
--- a/cvat-ui/src/components/task-page/job-list.tsx
+++ b/cvat-ui/src/components/task-page/job-list.tsx
@@ -55,9 +55,11 @@ function JobListComponent(props: Props & RouteComponentProps): JSX.Element {
                     {`Job #${id}`}
                 </Button>
                 |
-                <Tooltip title='Old version of UI is deprecated and will be removed from
-                                new versions of UI. We still recomend it only if you use
-                                specific features from it like cuboids annotation.'
+                <Tooltip
+                    title='Old version of UI is deprecated and will be removed from
+                           new versions of UI. We still recomend it only if you use
+                           specific features from it like cuboids annotation.'
+                    mouseLeaveDelay={0}
                 >
                     <Button type='link' href={`${baseURL}/?id=${id}`}>Old UI</Button>
                 </Tooltip>
@@ -150,7 +152,7 @@ function JobListComponent(props: Props & RouteComponentProps): JSX.Element {
             <Row type='flex' justify='space-between' align='middle'>
                 <Col>
                     <Text className='cvat-text-color cvat-jobs-header'> Jobs </Text>
-                    <Tooltip trigger='click' title='Copied to clipboard!'>
+                    <Tooltip trigger='click' title='Copied to clipboard!' mouseLeaveDelay={0}>
                         <Button
                             type='link'
                             onClick={(): void => {
diff --git a/cvat-ui/src/components/tasks-page/task-item.tsx b/cvat-ui/src/components/tasks-page/task-item.tsx
index 7eeeeacdeb2..66c9a0d3c50 100644
--- a/cvat-ui/src/components/tasks-page/task-item.tsx
+++ b/cvat-ui/src/components/tasks-page/task-item.tsx
@@ -145,7 +145,7 @@ class TaskItemComponent extends React.PureComponent<TaskItemProps & RouteCompone
                                     />
                                 </Col>
                                 <Col span={1} className='close-auto-annotation-icon'>
-                                    <Tooltip title='Cancel automatic annotation'>
+                                    <Tooltip title='Cancel automatic annotation' mouseLeaveDelay={0}>
                                         <Icon
                                             type='close'
                                             onClick={() => {
diff --git a/cvat-ui/src/containers/header/header.tsx b/cvat-ui/src/containers/header/header.tsx
index 49d5a8d051f..185226a7959 100644
--- a/cvat-ui/src/containers/header/header.tsx
+++ b/cvat-ui/src/containers/header/header.tsx
@@ -72,7 +72,7 @@ function mapStateToProps(state: CombinedState): StateToProps {
         coreVersion: packageVersion.core,
         canvasVersion: packageVersion.canvas,
         uiVersion: packageVersion.ui,
-        switchSettingsShortcut: normalizedKeyMap.OPEN_SETTINGS,
+        switchSettingsShortcut: normalizedKeyMap.SWITCH_SETTINGS,
         settingsDialogShown,
     };
 }
diff --git a/cvat-ui/src/utils/enviroment.ts b/cvat-ui/src/utils/enviroment.ts
index ebc8dd75b84..7642f4aaf36 100644
--- a/cvat-ui/src/utils/enviroment.ts
+++ b/cvat-ui/src/utils/enviroment.ts
@@ -2,6 +2,9 @@
 //
 // SPDX-License-Identifier: MIT
 
+/* eslint-disable @typescript-eslint/no-implied-eval */
+/* eslint-disable no-new-func */
+
 export function isDev(): boolean {
     return process.env.NODE_ENV === 'development';
 }