--- packag1/qtquickcontrols/src/controls/qquickmenu.cpp	Fri Mar 12 17:12:50 2021
+++ package/qtquickcontrols/src/controls/qquickmenu.cpp	Fri Mar 12 17:13:22 2021
@@ -457,6 +457,9 @@
         }
         globalTargetRect.translate(renderOffset);
         m_platformMenu->setMenuType(QPlatformMenu::MenuType(menuType));
+        if (QQuickItem *mg = (quickWindow ? quickWindow->mouseGrabberItem() : 0)) {
+            mg->ungrabMouse();
+        }
         m_platformMenu->showPopup(parentWindow,
                                   QHighDpi::toNativeLocalPosition(globalTargetRect.toRect(), parentWindow),
                                   atItem ? atItem->platformItem() : 0);