diff --git a/src/components/menu-item/submenu-controller.ts b/src/components/menu-item/submenu-controller.ts
index 67b0ee35..3d03b07d 100644
--- a/src/components/menu-item/submenu-controller.ts
+++ b/src/components/menu-item/submenu-controller.ts
@@ -229,6 +229,7 @@ export class SubmenuController implements ReactiveController {
   // newly opened menu.
   private enableSubmenu(delay = true) {
     if (delay) {
+      window.clearTimeout(this.enableSubmenuTimer);
       this.enableSubmenuTimer = window.setTimeout(() => {
         this.setSubmenuState(true);
       }, this.submenuOpenDelay);
@@ -238,7 +239,7 @@ export class SubmenuController implements ReactiveController {
   }
 
   private disableSubmenu() {
-    clearTimeout(this.enableSubmenuTimer);
+    window.clearTimeout(this.enableSubmenuTimer);
     this.setSubmenuState(false);
   }