Maximized (and fullscreen) frameless QML view is a can of worms, when it comes to menu pop-ups (on Windows)

#include <QQuickView>
#include <QQmlContext>
#include <QGuiApplication>

int main(int argc, char *argv[])
{
    QGuiApplication a(argc, argv);

    QQuickView view;
    view.setFlags( view.flags() | Qt::FramelessWindowHint );

    view.setResizeMode(QQuickView::SizeRootObjectToView);
    view.rootContext()->setContextProperty("view", &view);
    view.setSource(QUrl("qrc:/qml/main.qml"));

    view.resize(500, 300);
    view.show();

    return a.exec();
}

import QtQuick 2.0
import QtQuick.Window 2.2
import QtQuick.Controls 1.1
import QtQml 2.2

Rectangle {
    border.width: 10

    Menu {
        id: menu
        Instantiator {
            model: 20
            MenuItem {
                text: "Click me! #" + index
                onTriggered: console.log("clicked: #" + index)
            }
            onObjectAdded: menu.insertItem(index, object)
            onObjectRemoved: menu.removeItem(object)
        }
    }

    MouseArea {
        anchors.fill: parent
        onClicked: {
            console.log("popping up menu")
            menu.popup()
        }
    }

    Row { //[1] all three buttons may sometimes become unresponsive to mouse after maximizing / unmaximizing the window
          // (and this is *not* an issue with window contents not updated, as the rotating rectangle is still moving in the proper place)
        spacing: 50
        anchors.centerIn: parent
        Button {
            text: "maximize"

            //swap handlers below to make the issues in question go away (view.showFullScreen() would break as well)
            onClicked: view.showMaximized() //[2] may not work the second time you try it (maximize->unmaximize->maximize, button clicked, nothing happens)
//            onClicked: {
//                view.x = 0
//                view.width = Screen.width + 1 //not having "+ 1"s here has same breaking effect as showMaximized()
//                view.y = 0
//                view.height = Screen.height + 1 //see above
//            }
        }

        Button {
            text: "unmaximize"
            onClicked: {
                view.width = Screen.width / 2
                view.height = Screen.height / 2
            }
        }
        Button {
            text: "close"
            onClicked: view.close()
        }
    }

    //[3] with this commented out, the application fails to repaint in maximized state
    //  (shows its old window contents at (0,0) while still capturing mouse and keyboard... sometimes (see [1]))
//    Rectangle {
//        id: rect
//        opacity: .5
//        anchors.centerIn: parent
//        width: 100
//        height: width
//        color: "red"
//        RotationAnimation on rotation {
//            from: 0
//            to: 360
//            duration: 1000
//            onStopped: start()
//        }
//    }

    focus: true
    Keys.onSpacePressed: view.close() //when you're stuck :)
}