fix: resolved stale toolbox hover state

src/components/utils/popover/components/popover-item/popover-item-default/popover-item-default.ts

@@ -139,6 +139,20 @@ export class PopoverItemDefault extends PopoverItem {
     this.disableSpecialHoverAndFocusBehavior();
   }
 
+  /**
+   * Prevents stale hover state until the pointer enters the item again
+   */
+  public suppressHoverUntilPointerEnters(): void {
+    const root = this.nodes.root;
+
+    if (root === null || root.classList.contains(css.noHover)) {
+      return;
+    }
+
+    root.classList.add(css.noHover);
+    root.addEventListener('mouseenter', this.removeSpecialHoverBehavior, { once: true });
+  }
+
   /**
    * Constructs HTML element corresponding to popover item params
    *
@@ -256,8 +270,6 @@ export class PopoverItemDefault extends PopoverItem {
   private disableSpecialHoverAndFocusBehavior(): void  {
     this.removeSpecialFocusBehavior();
     this.removeSpecialHoverBehavior();
-
-    this.nodes.root?.removeEventListener('mouseleave', this.removeSpecialHoverBehavior);
   }
 
   /**
@@ -271,7 +283,12 @@ export class PopoverItemDefault extends PopoverItem {
    * Removes class responsible for special hover behavior on an item
    */
   private removeSpecialHoverBehavior = (): void => {
-    this.nodes.root?.classList.remove(css.noHover);
+    const root = this.nodes.root;
+
+    root?.classList.remove(css.noHover);
+    root?.removeEventListener('mouseleave', this.removeSpecialHoverBehavior);
+    root?.removeEventListener('mouseenter', this.removeSpecialHoverBehavior);
+    root?.removeEventListener('mousemove', this.removeSpecialHoverBehavior);
   };
 
   /**
@@ -283,7 +300,10 @@ export class PopoverItemDefault extends PopoverItem {
     if (!('confirmation' in item) || item.confirmation === undefined) {
       try {
         item.onActivate?.(item);
-        this.disableConfirmationMode();
+
+        if (this.isConfirmationStateEnabled) {
+          this.disableConfirmationMode();
+        }
       } catch {
         this.animateError();
       }

src/components/utils/popover/popover-desktop.ts

@@ -156,6 +156,8 @@ export class PopoverDesktop extends PopoverAbstract {
   public hide = (): void => {
     super.hide();
 
+    this.itemsDefault.forEach(item => item.suppressHoverUntilPointerEnters());
+
     this.destroyNestedPopoverIfExists();
 
     this.flipper?.deactivate();

test/cypress/tests/ui/toolbox.cy.ts

@@ -215,4 +215,51 @@ describe('Toolbox', function () {
         .should('exist');
     });
   });
+
+  it('should not keep a toolbox item hovered after closing and reopening the toolbox', function () {
+    /** Tool with one toolbox item for the hover regression. */
+    class HoverTool extends ToolMock {
+      /** Returns the toolbox entry displayed by this tool. */
+      public static get toolbox(): ToolboxConfig {
+        return {
+          icon: '',
+          title: 'Hover tool',
+        };
+      }
+    }
+
+    cy.createEditor({
+      tools: {
+        hoverTool: HoverTool,
+      },
+    }).as('editorInstance');
+
+    cy.get('[data-cy=editorjs]')
+      .find('.ce-paragraph')
+      .click();
+
+    cy.get<EditorJS>('@editorInstance').then((editor) => {
+      editor.toolbar.toggleToolbox(true);
+    });
+    cy.get('[data-item-name="hoverTool"]')
+      .should('be.visible')
+      .click();
+
+    cy.get('[data-item-name="hoverTool"]')
+      .should('have.class', 'ce-popover-item--no-hover');
+
+    cy.get<EditorJS>('@editorInstance').then((editor) => {
+      editor.toolbar.toggleToolbox(true);
+    });
+    cy.get('[data-item-name="hoverTool"]')
+      .should('be.visible')
+      .should('have.class', 'ce-popover-item--no-hover')
+      .should(($item) => {
+        expect($item[0].matches(':hover')).to.be.false;
+      });
+
+    cy.get('[data-item-name="hoverTool"]')
+      .trigger('mouseenter')
+      .should('not.have.class', 'ce-popover-item--no-hover');
+  });
 });