Checkable Platform MenuItem can't be used like Controls MenuItem

import QtQuick 2.9
import QtQuick.Controls 2.3

ApplicationWindow {
    id: root
    width: 600
    height: 600
    visible: true

    property bool foo: true

    Label {
        text: foo
        anchors.centerIn: parent
    }

    MenuBar {
        MenuBarItem {
            objectName: "animationMenuBarItem"
            focusPolicy: Qt.TabFocus
            menu: Menu {
                title: qsTr("Animation")

                MenuItem {
                    objectName: "animationPlaybackMenuButton"
                    text: qsTr("Animation Playback")
                    checkable: true
                    checked: foo
                    onClicked: foo = checked
                }
            }
        }
    }
}

import QtQuick 2.9
import QtQuick.Controls 2.3
import Qt.labs.platform 1.0 as Platform

ApplicationWindow {
    id: root
    width: 600
    height: 600
    visible: true

    property bool foo: true

    Label {
        text: foo
        anchors.centerIn: parent
    }

    Platform.MenuBar {
        Platform.Menu {
            id: animationMenu
            objectName: "animationMenu"
            title: qsTr("Animation")

            Platform.MenuItem {
                id: animationPlaybackMenuButton
                objectName: "animationPlaybackMenuButton"
                text: qsTr("Animation Playback")
                checkable: true
                checked: foo
                onTriggered: foo = checked
            }
        }
    }
}

onTriggered: foo = !checked