diff --git a/packages/survey-creator-angular/src/adorners/item-value.component.ts b/packages/survey-creator-angular/src/adorners/item-value.component.ts
index 03e47d657a..de6e733cad 100644
--- a/packages/survey-creator-angular/src/adorners/item-value.component.ts
+++ b/packages/survey-creator-angular/src/adorners/item-value.component.ts
@@ -37,6 +37,10 @@ export class ItemValueDesignerComponent extends CreatorModelComponent<ItemValueW
   protected getModel(): ItemValueWrapperViewModel {
     return this.adorner;
   }
+  override ngOnDestroy(): void {
+    super.ngOnDestroy();
+    this.adorner.dispose();
+  }
 }
 
 AngularComponentFactory.Instance.registerComponent("svc-item-value", ItemValueDesignerComponent);
diff --git a/packages/survey-creator-angular/src/adorners/matrix-cell.component.ts b/packages/survey-creator-angular/src/adorners/matrix-cell.component.ts
index 16e5033027..44b91aabb2 100644
--- a/packages/survey-creator-angular/src/adorners/matrix-cell.component.ts
+++ b/packages/survey-creator-angular/src/adorners/matrix-cell.component.ts
@@ -47,6 +47,10 @@ export class MatrixCellComponent extends CreatorModelComponent<MatrixCellWrapper
   protected getModel(): MatrixCellWrapperViewModel {
     return this.adorner;
   }
+  override ngOnDestroy(): void {
+    super.ngOnDestroy();
+    this.adorner.dispose();
+  }
 }
 
 AngularComponentFactory.Instance.registerComponent("svc-matrix-cell", MatrixCellComponent);
diff --git a/packages/survey-creator-angular/src/adorners/question-rating.component.ts b/packages/survey-creator-angular/src/adorners/question-rating.component.ts
index 4fdd770982..f0f5827de0 100644
--- a/packages/survey-creator-angular/src/adorners/question-rating.component.ts
+++ b/packages/survey-creator-angular/src/adorners/question-rating.component.ts
@@ -37,6 +37,10 @@ export class QuestionRatingAdornerDesignerComponent extends CreatorModelComponen
   protected getModel(): QuestionRatingAdornerViewModel {
     return this.adorner;
   }
+  override ngOnDestroy(): void {
+    super.ngOnDestroy();
+    this.adorner.dispose();
+  }
 }
 
 AngularComponentFactory.Instance.registerComponent("svc-rating-question-content", QuestionRatingAdornerDesignerComponent);
diff --git a/packages/survey-creator-angular/src/page.component.ts b/packages/survey-creator-angular/src/page.component.ts
index eee7115307..9abe6f7bb4 100644
--- a/packages/survey-creator-angular/src/page.component.ts
+++ b/packages/survey-creator-angular/src/page.component.ts
@@ -17,7 +17,6 @@ export class PageDesignerComponent extends CreatorModelComponent<PageAdorner> {
   public adorner!: PageAdorner;
   protected createModel(): void {
     if (this.model) {
-      this.previousModel?.dispose();
       this.adorner = new PageAdorner(this.creator, this.model);
     }
   }
diff --git a/packages/survey-creator-angular/src/question.component.ts b/packages/survey-creator-angular/src/question.component.ts
index 49f71740bc..902676b636 100644
--- a/packages/survey-creator-angular/src/question.component.ts
+++ b/packages/survey-creator-angular/src/question.component.ts
@@ -47,6 +47,10 @@ export class QuestionDesignerComponent extends CreatorModelComponent<QuestionAdo
     event.stopPropagation();
     this.adorner.addNewQuestion();
   }
+  override ngOnDestroy(): void {
+    super.ngOnDestroy();
+    this.adorner.dispose();
+  }
   adornerComponent = "";
 }
 
diff --git a/packages/survey-creator-angular/src/row.component.ts b/packages/survey-creator-angular/src/row.component.ts
index f1a00e3d8d..7095f70331 100644
--- a/packages/survey-creator-angular/src/row.component.ts
+++ b/packages/survey-creator-angular/src/row.component.ts
@@ -28,6 +28,11 @@ export class CreatorRowComponent extends CreatorModelComponent<RowViewModel> {
   getPropertiesToTrack(): string[] {
     return ["creator", "row"];
   }
+  override ngOnDestroy(): void {
+    super.ngOnDestroy();
+    this.model.dispose();
+  }
+
 }
 
 AngularComponentFactory.Instance.registerComponent("svc-row", CreatorRowComponent);
\ No newline at end of file
diff --git a/packages/survey-creator-angular/src/string-editor.component.ts b/packages/survey-creator-angular/src/string-editor.component.ts
index 533b15c448..3d406b310f 100644
--- a/packages/survey-creator-angular/src/string-editor.component.ts
+++ b/packages/survey-creator-angular/src/string-editor.component.ts
@@ -101,6 +101,9 @@ export class StringEditorComponent extends CreatorModelComponent<StringEditorVie
     }
   }
   override ngOnDestroy(): void {
+    this.baseModel.blurEditor = undefined as any;
+    this.baseModel.getEditorElement = undefined as any;
+    this.baseModel.dispose();
     this.locString?.onStringChanged.remove(this.onChangeHandler);
     super.ngOnDestroy();
   }
diff --git a/packages/survey-creator-angular/src/toolbox/toolbox-tool.component.ts b/packages/survey-creator-angular/src/toolbox/toolbox-tool.component.ts
index 15e71fb97e..1dfbf0a099 100644
--- a/packages/survey-creator-angular/src/toolbox/toolbox-tool.component.ts
+++ b/packages/survey-creator-angular/src/toolbox/toolbox-tool.component.ts
@@ -25,4 +25,8 @@ export class ToolboxToolComponent extends CreatorModelComponent<Action> {
   protected override getPropertiesToUpdateSync(): string[] {
     return ["mode"];
   }
+  override ngOnDestroy(): void {
+    super.ngOnDestroy();
+    this.model.dispose();
+  }
 }
diff --git a/packages/survey-creator-core/src/components/action-container-view-model.ts b/packages/survey-creator-core/src/components/action-container-view-model.ts
index 845f48366d..7ad93da68b 100644
--- a/packages/survey-creator-core/src/components/action-container-view-model.ts
+++ b/packages/survey-creator-core/src/components/action-container-view-model.ts
@@ -71,6 +71,10 @@ export class SurveyElementAdornerBase<T extends SurveyElement = SurveyElement> e
   public dispose(): void {
     super.dispose();
     this.detachElement(this.surveyElement);
+    this.actionContainer.dispose();
+    this.creator.sidebar.onPropertyChanged.remove(this.sidebarFlyoutModeChangedFunc);
+    this.selectedPropPageFunc = undefined;
+    this.sidebarFlyoutModeChangedFunc = undefined;
   }
   protected onElementSelectedChanged(isSelected: boolean): void {
     if (!isSelected) return;
diff --git a/packages/survey-creator-core/src/components/page-navigator/page-navigator.ts b/packages/survey-creator-core/src/components/page-navigator/page-navigator.ts
index 146d97f639..d4128cb7a1 100644
--- a/packages/survey-creator-core/src/components/page-navigator/page-navigator.ts
+++ b/packages/survey-creator-core/src/components/page-navigator/page-navigator.ts
@@ -17,6 +17,16 @@ export class PageNavigatorViewModel extends Base {
   };
   private _resizeObserver: ResizeObserver;
 
+  private pcPropertyChangedHandler = (sender, options) => {
+    if (options.name === "toolboxLocation") {
+      if (this.pagesController.creator["toolboxLocation"] == "sidebar") {
+        this.popupModel.horizontalPosition = "right";
+      } else {
+        this.popupModel.horizontalPosition = this.pagesController.creator["toolboxLocation"];
+      }
+    }
+  }
+
   constructor(private pagesController: PagesController, private pageEditMode: string) {
     super();
     this.icon = "icon-select-page";
@@ -38,15 +48,7 @@ export class PageNavigatorViewModel extends Base {
     };
     this.popupModel.onHide = () => { this.isPopupOpened = false; };
     if (!!this.pagesController.creator["onPropertyChanged"]) {
-      this.pagesController.creator["onPropertyChanged"].add((sender, options) => {
-        if (options.name === "toolboxLocation") {
-          if (this.pagesController.creator["toolboxLocation"] == "sidebar") {
-            this.popupModel.horizontalPosition = "right";
-          } else {
-            this.popupModel.horizontalPosition = this.pagesController.creator["toolboxLocation"];
-          }
-        }
-      });
+      this.pagesController.creator["onPropertyChanged"].add(this.pcPropertyChangedHandler);
     }
     this.buildItems();
   }
@@ -55,6 +57,18 @@ export class PageNavigatorViewModel extends Base {
     this.stopItemsContainerHeightObserver();
     this.pagesController.onPagesChanged.remove(this.pagesChangedFunc);
     this.pagesController.onCurrentPageChanged.remove(this.currentPagesChangedFunc);
+    if (!!this.pagesController.creator["onPropertyChanged"]) {
+      this.pagesController.creator["onPropertyChanged"].remove(this.pcPropertyChangedHandler);
+      this.pcPropertyChangedHandler = undefined;
+    }
+    if(this.pageListModel) {
+      this.pageListModel.dispose();
+    }
+    if(this.popupModel) {
+      this.popupModel.dispose();
+    }
+    this._scrollableContainer = undefined;
+    this._itemsContainer = undefined;
   }
 
   @propertyArray() items: Array<IAction>;
diff --git a/packages/survey-creator-core/src/components/page.ts b/packages/survey-creator-core/src/components/page.ts
index 9ce3f929ff..9f3a32cb3d 100644
--- a/packages/survey-creator-core/src/components/page.ts
+++ b/packages/survey-creator-core/src/components/page.ts
@@ -15,7 +15,7 @@ export class PageAdorner extends SurveyElementAdornerBase<PageModel> {
   @property({ defaultValue: "" }) currentAddQuestionType: string;
   @property({ defaultValue: null }) dragTypeOverMe: DragTypeOverMeEnum;
   private updateDragTypeOverMe() {
-    this.dragTypeOverMe = this.page.dragTypeOverMe;
+    this.dragTypeOverMe = this.page?.dragTypeOverMe;
   }
   constructor(creator: CreatorBase, page: PageModel) {
     super(creator, page);
@@ -93,8 +93,8 @@ export class PageAdorner extends SurveyElementAdornerBase<PageModel> {
     };
   }
   public dispose(): void {
-    super.dispose();
     this.detachElement(this.page);
+    super.dispose();
     this.onPropertyValueChangedCallback = undefined;
   }
   public get isGhost(): boolean {
diff --git a/packages/survey-creator-core/src/components/question-image.ts b/packages/survey-creator-core/src/components/question-image.ts
index 1376d95981..a66ffbb002 100644
--- a/packages/survey-creator-core/src/components/question-image.ts
+++ b/packages/survey-creator-core/src/components/question-image.ts
@@ -21,7 +21,7 @@ export class QuestionImageAdornerViewModel extends QuestionAdornerViewModel {
     this.filePresentationModel.storeDataAsText = false;
     surveyModel.onUploadFiles.add((s, o) => {
       const fileToUpload = o.files[0];
-      if(!!fileToUpload) {
+      if (!!fileToUpload) {
         this.creator.uploadFiles(o.files, this.question, (status, link) => {
           this.question.imageLink = link;
         });
@@ -78,4 +78,9 @@ export class QuestionImageAdornerViewModel extends QuestionAdornerViewModel {
   public get chooseImageText(): string {
     return getLocString("ed.imageChooseImage");
   }
+
+  public dispose() {
+    super.dispose();
+    this.questionRoot = undefined;
+  }
 }
\ No newline at end of file
diff --git a/packages/survey-creator-core/src/components/question.ts b/packages/survey-creator-core/src/components/question.ts
index 023bb3b5ea..1f274c1547 100644
--- a/packages/survey-creator-core/src/components/question.ts
+++ b/packages/survey-creator-core/src/components/question.ts
@@ -168,6 +168,7 @@ export class QuestionAdornerViewModel extends SurveyElementAdornerBase {
     if (!!this.surveyElement["setCanShowOptionItemCallback"]) {
       (<any>this.surveyElement).setCanShowOptionItemCallback(undefined);
     }
+    super.dispose();
   }
   get isDraggable() {
     return true;
diff --git a/packages/survey-creator-core/src/components/side-bar/side-bar-model.ts b/packages/survey-creator-core/src/components/side-bar/side-bar-model.ts
index c51397deff..35ad3a4108 100644
--- a/packages/survey-creator-core/src/components/side-bar/side-bar-model.ts
+++ b/packages/survey-creator-core/src/components/side-bar/side-bar-model.ts
@@ -91,6 +91,11 @@ export class SidebarModel extends Base {
   private getCurrentHandles(): string {
     return this.creator.sidebarLocation == "right" ? "w" : "e";
   }
+  private sidebarLocationChangedHandler = (sender, options) => {
+    if (options.name === "sidebarLocation" && !!this.resizeManager) {
+      this.resizeManager.setHandles(this.getCurrentHandles());
+    }
+  };
 
   constructor(private creator: CreatorBase) {
     super();
@@ -99,11 +104,7 @@ export class SidebarModel extends Base {
       this.visible = options.show;
     };
     this.creator.onShowSidebarVisibilityChanged.add(this.onSidebarVisibilityChanged);
-    this.creator.onPropertyChanged.add((sender, options) => {
-      if (options.name === "sidebarLocation" && !!this.resizeManager) {
-        this.resizeManager.setHandles(this.getCurrentHandles());
-      }
-    });
+    this.creator.onPropertyChanged.add(this.sidebarLocationChangedHandler);
     this.visible = this.creator.showSidebar;
     this.createActions();
   }
@@ -131,7 +132,10 @@ export class SidebarModel extends Base {
   public dispose() {
     if (!!this.creator && !this.isDisposed) {
       this.creator.onShowSidebarVisibilityChanged.remove(this.onSidebarVisibilityChanged);
+      this.creator.onPropertyChanged.remove(this.sidebarLocationChangedHandler);
+      this.sidebarLocationChangedHandler = undefined;
     }
+    this.resetResizeManager();
     super.dispose();
   }
   public initResizeManager(container: HTMLDivElement): void {
diff --git a/packages/survey-creator-core/src/components/string-editor.ts b/packages/survey-creator-core/src/components/string-editor.ts
index cb72c43051..bec7098c6c 100644
--- a/packages/survey-creator-core/src/components/string-editor.ts
+++ b/packages/survey-creator-core/src/components/string-editor.ts
@@ -25,7 +25,7 @@ export abstract class StringItemsNavigatorBase {
 
   protected addNewItems(items: any, startIndex: number, itemsToAdd: string[]) {
     const createNewItem = (val: any): ItemValue => {
-      if(this.question.createItemValue) return this.question.createItemValue(val);
+      if (this.question.createItemValue) return this.question.createItemValue(val);
       return new ItemValue(val);
     };
     let newItems = items.slice(0, startIndex).concat(itemsToAdd.map(text => createNewItem(text))).concat(items.slice(startIndex + 1));
@@ -117,7 +117,7 @@ class StringItemsNavigatorSelectBase extends StringItemsNavigatorBase {
   }
   protected addNewItem(creator: CreatorBase, items: any, text: string = null) {
     const itemValue = creator.createNewItemValue(this.question);
-    if(!!text) itemValue.value = text;
+    if (!!text) itemValue.value = text;
   }
   protected getItemsPropertyName(items: any) {
     return "choices";
@@ -217,9 +217,7 @@ export class StringEditorViewModelBase extends Base {
 
   constructor(private locString: LocalizableString, private creator: CreatorBase) {
     super();
-    this.connector = StringEditorConnector.get(locString);
-    this.connector.onDoActivate.add(() => { this.activate(); });
-    this.checkMarkdownToTextConversion(this.locString.owner, this.locString.name);
+    this.setLocString(locString);
   }
 
   public afterRender() {
@@ -228,7 +226,12 @@ export class StringEditorViewModelBase extends Base {
     }
   }
 
-  public activate() {
+  public dispose() {
+    super.dispose();
+    this.connector.onDoActivate.remove(this.activate);
+  }
+
+  public activate = () => {
     const element = this.getEditorElement();
     if (element && element.offsetParent != null) {
       element.focus();
@@ -239,9 +242,11 @@ export class StringEditorViewModelBase extends Base {
   }
 
   public setLocString(locString: LocalizableString) {
+    this.connector?.onDoActivate.clear();
     this.locString = locString;
     this.connector = StringEditorConnector.get(locString);
-    this.connector.onDoActivate.add(() => { this.activate(); });
+    this.connector.onDoActivate.add(this.activate);
+    this.checkMarkdownToTextConversion(this.locString.owner, this.locString.name);
   }
   public checkConstraints(event: any) {
     if (this.maxLength > 0 && event.keyCode >= 32) {
@@ -373,12 +378,12 @@ export class StringEditorViewModelBase extends Base {
           this.creator.inplaceEditForValues &&
           ["noneText", "otherText", "selectAllText"].indexOf(this.locString.name) == -1) {
           const itemValue = <ItemValue>this.locString.owner;
-          if(itemValue.value !== clearedText) {
-            if(!!itemValue.locOwner && !!itemValue.ownerPropertyName) {
+          if (itemValue.value !== clearedText) {
+            if (!!itemValue.locOwner && !!itemValue.ownerPropertyName) {
               const choices = itemValue.locOwner[itemValue.ownerPropertyName];
-              if(Array.isArray(choices) && !!ItemValue.getItemByValue(choices, clearedText)) {
+              if (Array.isArray(choices) && !!ItemValue.getItemByValue(choices, clearedText)) {
                 clearedText = getNextItemValue(clearedText, choices);
-                if(!!event && !!event.target) {
+                if (!!event && !!event.target) {
                   event.target.innerText = clearedText;
                 }
               }
diff --git a/packages/survey-creator-core/src/components/tabs/designer-plugin.ts b/packages/survey-creator-core/src/components/tabs/designer-plugin.ts
index 88fce2cdc6..879dfc6856 100644
--- a/packages/survey-creator-core/src/components/tabs/designer-plugin.ts
+++ b/packages/survey-creator-core/src/components/tabs/designer-plugin.ts
@@ -125,12 +125,8 @@ export class TabDesignerPlugin implements ICreatorPlugin {
       action: () => {
         this.selectSurvey();
       },
-      active: <any>new ComputedUpdater<boolean>(() => {
-        return notShortCircuitAnd(this.creator.sidebar.activeTab === this.propertyGridTab.id, this.isSurveySelected);
-      }),
-      pressed: <any>new ComputedUpdater<boolean>(() => {
-        return notShortCircuitAnd(this.creator.sidebar.activeTab === this.propertyGridTab.id, this.isSurveySelected);
-      }),
+      active: this.isSettingsActive,
+      pressed: this.isSettingsActive,
       visible: this.createVisibleUpdater(),
       locTitleName: "ed.surveySettings",
       locTooltipName: "ed.surveySettingsTooltip",
diff --git a/packages/survey-creator-core/src/components/tabs/test-plugin.ts b/packages/survey-creator-core/src/components/tabs/test-plugin.ts
index bb7cc926f9..74768d9ecf 100644
--- a/packages/survey-creator-core/src/components/tabs/test-plugin.ts
+++ b/packages/survey-creator-core/src/components/tabs/test-plugin.ts
@@ -111,6 +111,7 @@ export class TabTestPlugin implements ICreatorPlugin {
     if (this.model) {
       this.simulatorTheme = this.model.simulator.survey.css;
       this.model.onSurveyCreatedCallback = undefined;
+      this.model.dispose();
       this.model = undefined;
     }
     this.languageSelectorAction.visible = false;
diff --git a/packages/survey-creator-core/src/components/tabs/test.ts b/packages/survey-creator-core/src/components/tabs/test.ts
index 71e9305e9b..5da9a64c3d 100644
--- a/packages/survey-creator-core/src/components/tabs/test.ts
+++ b/packages/survey-creator-core/src/components/tabs/test.ts
@@ -307,4 +307,10 @@ export class TestSurveyTabViewModel extends Base {
     this.survey.onScroll();
     return true;
   }
+  public dispose(): void {
+    if (this.selectPageAction) {
+      this.selectPageAction.dispose();
+    }
+    this.simulator.dispose();
+  }
 }
diff --git a/packages/survey-creator-core/src/components/tabs/theme-plugin.ts b/packages/survey-creator-core/src/components/tabs/theme-plugin.ts
index 5459143cb8..d3c2ef1b83 100644
--- a/packages/survey-creator-core/src/components/tabs/theme-plugin.ts
+++ b/packages/survey-creator-core/src/components/tabs/theme-plugin.ts
@@ -90,6 +90,7 @@ export class TabThemePlugin implements ICreatorPlugin {
     if (this.model) {
       this.simulatorTheme = this.model.simulator.survey.css;
       this.model.onSurveyCreatedCallback = undefined;
+      this.model.dispose();
       this.model = undefined;
     }
     this.sidebarTab.visible = false;
diff --git a/packages/survey-creator-core/src/components/tabs/theme.ts b/packages/survey-creator-core/src/components/tabs/theme.ts
index fb606300e6..a1d7c6fff1 100644
--- a/packages/survey-creator-core/src/components/tabs/theme.ts
+++ b/packages/survey-creator-core/src/components/tabs/theme.ts
@@ -1077,4 +1077,11 @@ export class ThemeSurveyTabViewModel extends Base {
 
     return themeEditorSurveyJSON;
   }
+  public dispose(): void {
+    this.themeEditorSurveyValue?.dispose();
+    if (this.selectPageAction) {
+      this.selectPageAction.dispose();
+    }
+    this.simulator.dispose();
+  }
 }
diff --git a/packages/survey-creator-knockout/src/adorners/question.ts b/packages/survey-creator-knockout/src/adorners/question.ts
index 3d77e56fa7..2009aa5812 100644
--- a/packages/survey-creator-knockout/src/adorners/question.ts
+++ b/packages/survey-creator-knockout/src/adorners/question.ts
@@ -27,9 +27,9 @@ export function createQuestionViewModel(
     return model.isEmptyElement;
   });
   model["adornerComponent"] = undefined;
-  new ImplementorBase(model);
+  const implementor = new ImplementorBase(model);
   ko.utils.domNodeDisposal.addDisposeCallback(componentInfo.element, () => {
-    model.dispose();
+    implementor.dispose();
   });
   return model;
 }
diff --git a/packages/survey-creator-knockout/src/page-navigator/page-navigator.ts b/packages/survey-creator-knockout/src/page-navigator/page-navigator.ts
index a7d744f041..8932f5e1ba 100644
--- a/packages/survey-creator-knockout/src/page-navigator/page-navigator.ts
+++ b/packages/survey-creator-knockout/src/page-navigator/page-navigator.ts
@@ -27,7 +27,7 @@ ko.components.register("svc-page-navigator", {
     createViewModel: (params: any, componentInfo: any) => {
       const model = new PageNavigatorView(params.controller, params.pageEditMode);
       model.setItemsContainer(componentInfo.element.parentElement);
-      new ImplementorBase(model);
+      const implementor = new ImplementorBase(model);
       const scrollableViewPort = componentInfo.element.parentElement.parentElement.parentElement;
       model.setScrollableContainer(scrollableViewPort);
       if (params.pageEditMode !== "bypage") {
@@ -38,6 +38,7 @@ ko.components.register("svc-page-navigator", {
       ko.utils.domNodeDisposal.addDisposeCallback(componentInfo.element, () => {
         scrollableViewPort.onscroll = undefined;
         model.dispose();
+        implementor.dispose();
       });
       return model;
     },
diff --git a/packages/survey-creator-knockout/src/page.ts b/packages/survey-creator-knockout/src/page.ts
index 6c37ec6ae1..d932f65ca6 100644
--- a/packages/survey-creator-knockout/src/page.ts
+++ b/packages/survey-creator-knockout/src/page.ts
@@ -33,6 +33,10 @@ export class CreatorSurveyPageComponent extends PageAdorner {
   fixedDispose(): void {
     this.pageUpdater && this.pageUpdater.dispose();
     super.dispose();
+    if(ko.isWritableObservable(this._page)) {
+      (this._page as ko.Observable<PageModel>)(undefined);
+    }
+    this._page = undefined;
   }
 
   dispose(): void {
diff --git a/packages/survey-creator-knockout/src/string-editor.ts b/packages/survey-creator-knockout/src/string-editor.ts
index 7f72baaf6a..cf7d488d30 100644
--- a/packages/survey-creator-knockout/src/string-editor.ts
+++ b/packages/survey-creator-knockout/src/string-editor.ts
@@ -4,25 +4,23 @@ import { LocalizableString } from "survey-core";
 import { ImplementorBase } from "survey-knockout-ui";
 const template = require("./string-editor.html");
 
+function getEditorElement(element: HTMLElement) {
+  return (element.nextSibling as any).getElementsByClassName("sv-string-editor")[0];
+}
+
 export class StringEditorViewModel {
   private implementor = undefined;
   private baseModel: StringEditorViewModelBase;
 
-  getEditorElement = (element) => {
-    return element.nextSibling.getElementsByClassName(
-      "sv-string-editor"
-    )[0];
-  };
-
   constructor(public locString: any, private creator: CreatorBase, element: any) {
     this.baseModel = new StringEditorViewModelBase(locString, creator);
-    this.baseModel.getEditorElement = () => this.getEditorElement(element);
+    this.baseModel.getEditorElement = () => getEditorElement(element);
     this.implementor = new ImplementorBase(this.baseModel);
     this.focusEditor = () => {
-      this.getEditorElement(element).focus();
+      getEditorElement(element).focus();
     };
     this.baseModel.blurEditor = () => {
-      const editorElement = this.getEditorElement(element);
+      const editorElement = getEditorElement(element);
       editorElement.blur();
       editorElement.spellcheck = false;
     };
@@ -34,7 +32,7 @@ export class StringEditorViewModel {
     return locString;
   }
 
-  public afterRender = ()=>{
+  public afterRender = () => {
     this.baseModel.afterRender();
   }
 
@@ -52,7 +50,7 @@ export class StringEditorViewModel {
     return this.baseModel.placeholder;
   }
   public get contentEditable(): string {
-    return this.baseModel.contentEditable?"true":"false";
+    return this.baseModel.contentEditable ? "true" : "false";
   }
   public get characterCounter(): any {
     return this.baseModel.characterCounter;
@@ -116,10 +114,14 @@ export class StringEditorViewModel {
   public focusEditor: () => void;
   public dispose(): void {
     this.locString.onSearchChanged = undefined;
+    if (!!this.implementor) {
+      this.implementor.dispose();
+      this.implementor = undefined;
+    }
     this.focusEditor = undefined;
     this.baseModel.blurEditor = undefined;
-    this.implementor.dispose();
-    this.implementor = undefined;
+    this.baseModel.getEditorElement = undefined;
+    this.baseModel.dispose();
   }
 }
 
@@ -180,6 +182,7 @@ ko.components.register(editableStringRendererName, {
 
       ko.utils.domNodeDisposal.addDisposeCallback(componentInfo.element, () => {
         subscrib.dispose();
+        model.dispose();
       });
       return model;
     },
diff --git a/packages/survey-creator-knockout/src/tabbed-menu/tabbed-menu.ts b/packages/survey-creator-knockout/src/tabbed-menu/tabbed-menu.ts
index d7f7d22eee..f64e991cd7 100644
--- a/packages/survey-creator-knockout/src/tabbed-menu/tabbed-menu.ts
+++ b/packages/survey-creator-knockout/src/tabbed-menu/tabbed-menu.ts
@@ -12,16 +12,17 @@ ko.components.register("svc-tabbed-menu", {
     createViewModel: (params: any, componentInfo: any) => {
       const model = params.model;
       const container: HTMLDivElement = componentInfo.element.nextElementSibling;
-      new ActionContainerImplementor(model);
+      const reactivityImplementor = new ActionContainerImplementor(model);
 
       const manager: ResponsivityManager = new ResponsivityManager(
         container,
         model,
         ".svc-tabbed-menu-item-container:not(.sv-dots)>.sv-action__content"
       );
-      ko.utils.domNodeDisposal.addDisposeCallback(container, () =>
-        manager.dispose()
-      );
+      ko.utils.domNodeDisposal.addDisposeCallback(container, () => {
+        manager.dispose();
+        reactivityImplementor.dispose();
+      });
       return model;
     }
   },
diff --git a/packages/survey-creator-react/src/StringEditor.tsx b/packages/survey-creator-react/src/StringEditor.tsx
index f48cee6dce..0e21bfbdd3 100644
--- a/packages/survey-creator-react/src/StringEditor.tsx
+++ b/packages/survey-creator-react/src/StringEditor.tsx
@@ -11,14 +11,12 @@ export class SurveyLocStringEditor extends CreatorModelElement<any, any> {
     super(props);
     this.state = { changed: 0 };
     this.svStringEditorRef = React.createRef();
-    this.baseModel.getEditorElement = () => this.svStringEditorRef.current;
   }
   protected createModel(): void {
+    if (this.baseModel) {
+      this.baseModel.dispose();
+    }
     this.baseModel = new StringEditorViewModelBase(this.locString, this.creator);
-    this.baseModel.blurEditor = () => {
-      this.svStringEditorRef.current.blur();
-      this.svStringEditorRef.current.spellcheck = false;
-    };
   }
   protected getUpdatedModelProps(): string[] {
     return ["creator", "locString"];
@@ -46,7 +44,11 @@ export class SurveyLocStringEditor extends CreatorModelElement<any, any> {
   public componentDidMount() {
     super.componentDidMount();
     if (!this.locString) return;
-    const self: SurveyLocStringEditor = this;
+    this.baseModel.getEditorElement = () => this.svStringEditorRef.current;
+    this.baseModel.blurEditor = () => {
+      this.svStringEditorRef.current.blur();
+      this.svStringEditorRef.current.spellcheck = false;
+    };
     this.baseModel.afterRender();
     this.locString.onStringChanged.add(this.onChangedHandler);
     if (this.locString["__isEditing"]) {
@@ -56,10 +58,14 @@ export class SurveyLocStringEditor extends CreatorModelElement<any, any> {
   }
   public componentDidUpdate(prevProps: any, prevState: any): void {
     super.componentDidUpdate(prevProps, prevState);
+    this.baseModel.setLocString(this.locString);
     this.baseModel.afterRender();
   }
   public componentWillUnmount() {
     super.componentWillUnmount();
+    this.baseModel.getEditorElement = undefined;
+    this.baseModel.blurEditor = undefined;
+    this.baseModel.dispose();
     if (!this.locString) return;
     this.locString.onStringChanged.remove(this.onChangedHandler);
   }
@@ -119,9 +125,6 @@ export class SurveyLocStringEditor extends CreatorModelElement<any, any> {
     if (!this.locString) {
       return null;
     }
-    else {
-      this.baseModel.setLocString(this.locString);
-    }
     let control = null;
     if (this.locString.hasHtml) {
       const htmlValue = { __html: this.baseModel.focused && this.baseModel.editAsText && this.locString.text || this.locString.renderedHtml };
diff --git a/packages/survey-creator-react/src/adorners/Page.tsx b/packages/survey-creator-react/src/adorners/Page.tsx
index 60a0333247..61bc755e4c 100644
--- a/packages/survey-creator-react/src/adorners/Page.tsx
+++ b/packages/survey-creator-react/src/adorners/Page.tsx
@@ -56,6 +56,7 @@ export class CreatorSurveyPageComponent extends CreatorModelElement<
   }
   componentWillUnmount() {
     super.componentWillUnmount();
+    this.model.onPageSelectedCallback = undefined;
     this.model.dispose();
   }
   protected canRender(): boolean {
diff --git a/packages/survey-creator-react/src/adorners/Question.tsx b/packages/survey-creator-react/src/adorners/Question.tsx
index 35c0c98f5d..cc8b8dfec3 100644
--- a/packages/survey-creator-react/src/adorners/Question.tsx
+++ b/packages/survey-creator-react/src/adorners/Question.tsx
@@ -26,6 +26,9 @@ export class QuestionAdornerComponent extends CreatorModelElement<
   protected rootRef: React.RefObject<HTMLDivElement>;
 
   protected createModel(): void {
+    if (this.modelValue) {
+      this.modelValue.dispose();
+    }
     this.modelValue = this.createQuestionViewModel();
   }
   protected createQuestionViewModel(): QuestionAdornerViewModel {