QtQC2 MacOS style theme switching not fully implemented

When switching Dark/Light theme while the application is running,

1) Only the window decoration (e.g. title bar) changes (QTBUG96582-1.png)
2) The button will change when the window gets focus again (QTBUG96582-2.png)
3) The window background nor the label do not change at all until the window is closed and re-opened.

import QtQuick
import QtQuick.Controls

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

    Button {
        text: "button"
    }

    Label {
        text: "Hello QML "
        anchors.centerIn: parent
    }
}