[Reg 6.7.0 -> dev] Bindings on width/height of ApplicationWindow.background are not respected

import QtQuick
import QtQuick.Controls.Basic

ApplicationWindow {
    id: window
    width: 640
    height: 480
    visible: true

    background: Rectangle {
        property real scaleFactor: shrinkBtn.checked ? 0.5 : 1

        color: "green"
        width: window.width * scaleFactor
        height: window.height * scaleFactor
        anchors.centerIn: parent
    }

    Button {
        id: shrinkBtn
        checkable: true
        text: "Shrink Background"
    }
}