When MouseArea goes from one window to another, its containsMouse property is not updated

import QtQuick 2.12
import QtQuick.Controls 2.12
import QtQuick.Window 2.12Window {
    id: root
    width: 480
    height: 640
    visible: true    Rectangle {
        id: rect
        width: 480
        height: 100
        color: ma.containsMouse ? "green" : "red"        MouseArea {
            id: ma
            anchors.fill: parent
            hoverEnabled: true
            onClicked: {
                rect.parent = window2.contentItem
            }
        }
    }    Window {
        id: window2
        x: root.x + root.width
        y: root.y
        width: 300
        height: 300
        visible: true
    }
}