QHelpEvent::globalPos() returns frequently a wrong value.

    } else if (lastMouseReceiver && widgetUnderMouse) {
        #if 1
        auto savedPosition = event->globalPosition();
        #endif

        // Dispatch enter/leave if we move:
        // 1) from an alien widget to another alien widget or
        //    from a native widget to an alien widget (first OR case)
        // 2) from an alien widget to a native widget (second OR case)
        if ((alienWidget && alienWidget != lastMouseReceiver)
            || (isAlien(lastMouseReceiver) && !alienWidget)) {
            if (activePopupWidget) {
                if (!QWidget::mouseGrabber())
                    dispatchEnterLeave(alienWidget ? alienWidget : nativeWidget, lastMouseReceiver, event->globalPosition());
            } else {
                dispatchEnterLeave(receiver, lastMouseReceiver, event->globalPosition());
            }

        #if 1
        if (event->globalPosition() != savedPosition)
            qDebug() << event->globalPosition() << savedPosition;
        #endif
        }
    }