diff --git a/src/scriptengines/qml/plasmoid/containmentinterface.cpp b/src/scriptengines/qml/plasmoid/containmentinterface.cpp
--- a/src/scriptengines/qml/plasmoid/containmentinterface.cpp
+++ b/src/scriptengines/qml/plasmoid/containmentinterface.cpp
@@ -1015,9 +1015,17 @@
     desktopMenu->setAttribute(Qt::WA_TranslucentBackground);
     //end workaround
 
-    if (window() && window()->mouseGrabberItem()) {
-        window()->mouseGrabberItem()->ungrabMouse();
-    }
+    auto ungrabMouseHack = [this]() {
+        if (window() && window()->mouseGrabberItem()) {
+            window()->mouseGrabberItem()->ungrabMouse();
+        }
+    };
+
+#if QT_VERSION >= QT_VERSION_CHECK(5, 8, 0)
+    QTimer::singleShot(0, this, ungrabMouseHack);
+#else
+    ungrabMouseHack();
+#endif
 
     QPoint pos = event->globalPos();
     if (window() && m_containment->containmentType() == Plasma::Types::PanelContainment) {