diff --git a/cvat-ui/src/components/annotation-page/grades-form/grades-form.tsx b/cvat-ui/src/components/annotation-page/grades-form/grades-form.tsx
index 676b26bbbb5c..1b2a8f3771ed 100644
--- a/cvat-ui/src/components/annotation-page/grades-form/grades-form.tsx
+++ b/cvat-ui/src/components/annotation-page/grades-form/grades-form.tsx
@@ -103,7 +103,7 @@ export function GradesForm({ task }: Props): JSX.Element | null {
     const handleUpdate = useCallback(async () => {
         const formValues = await formRef.current?.validateFields();
         if (formValues) {
-            // dispatch(gradesActions.setGrades(formValues));
+            dispatch(gradesActions.setGrades(formValues));
             dispatch(submitHumanGradesAsync(frameOptions.certificateId));
         }
     }, [frameOptions]);
diff --git a/cvat-ui/src/reducers/grades-reducer.ts b/cvat-ui/src/reducers/grades-reducer.ts
index 880bc56521fb..77218ea52d6a 100644
--- a/cvat-ui/src/reducers/grades-reducer.ts
+++ b/cvat-ui/src/reducers/grades-reducer.ts
@@ -97,7 +97,13 @@ export default function (state: GradesState = defaultState, action: any): Grades
         case GradesActionsTypes.SET_LOADING:
             return { ...state, loading: action.payload.loading };
         case GradesActionsTypes.LOAD_VALUES:
-            return { ...state, values: action.payload.values };
+            return {
+                ...state,
+                values: {
+                    ...state.values,
+                    ...action.payload.values,
+                },
+            };
         case GradesActionsTypes.ASSIGN_VALUES:
             return {
                 ...state,