Shortcut of MenuItem QML Type from Qt Labs Platform is partially broken.

import QtQuick
import QtQuick.Controls
import Qt.labs.platform as Labs

Window {
    width: 640
    height: 480
    visible: true
    title: qsTr("MenuTest")

    Labs.MenuBar {
        Labs.Menu {
            title: qsTr("&Navigation")

            Labs.MenuItem {
                text: qsTr("Previous Frame")
                shortcut: StandardKey.Back
                onTriggered: {
                    console.log("previous frame");
                }
            }
        }
    }
}