Loaded WindowModal window is not embedded into parent window on macOS

import QtQuick 2.0
import QtQuick.Window 2.2

Window {
    width: 100
    height: 100
    modality: Qt.WindowModal
    visible: true

    Rectangle {
        anchors.fill: parent
        color: "#1f1f1f"
    }

    Text {
        anchors.centerIn: parent
        text: "Modal Window"
        color: "#ffffff"
    }
}

import QtQuick 2.0
import QtQuick.Window 2.2

Window {
    id: rootWindow

    visible: true
    width: 640
    height: 480
    title: "Root Window"

    ModalWindow {}
}

    Component.onCompleted: {
        var windowComponent = Qt.createComponent("ModalWindow.qml")
        var window = windowComponent.createObject(rootWindow.contentItem)
    }

    Loader {
        anchors.fill: parent
        source: "ModalWindow.qml"
    }