BusyIndicator problems when hiding a Window

Create a Window with BusyIndicator.

After hiding and showing the Window again one of the following effects is observed:

• The entire window contents are spinning instead of BusyIndicator.
• One of the window elements is spinning (if any present).
• The app freezes.
• App's message loop freezes (network activity stopped etc, if any).

Setting BusyIndicator's 'running' or 'visible' properties to 'false' before closing the Window does not help.

Setting 'running' to false then waiting a second before closing the window fixes the issue.

Attached is a simple test project reproducing the issue. Open / close the dialog multiple times to reproduce.

The bug is present only on Windows. Works fine on Mac OS.

import QtQuick 2.2
import QtQuick.Controls 1.1

ApplicationWindow {
    visible: true
    width: 640
    height: 480
    title: qsTr("Hello World")

    MouseArea {
        anchors.fill: parent
        onClicked: testDialog.show()
    }

    Text {
        text: qsTr("Click to open the dialog")
        anchors.centerIn: parent
    }

    TestDialog {
        id: testDialog
    }
}

import QtQuick 2.0
import QtQuick.Window 2.0
import QtQuick.Controls 1.1

Window {
    Component.onCompleted: busyIndicator.running = true
    BusyIndicator {
        id: busyIndicator
        anchors.centerIn: parent
    }
}