QML Video crashed when it is (un)loaded from Loader

import QtQuick 2.3
import QtQuick.Window 2.2
import QtMultimedia 5.0

Window {
    visible: true

    Loader {
        id: loader
        anchors.fill: parent
        sourceComponent: videoContainer
    }

    Component {
        id: videoContainer
        Video {
            autoPlay: true
            source: "qrc:/video.avi"
        }

//        Image {
//            source: "qrc:/picture.png"
//        }
    }

    Timer {
        id: t
        interval: 500 // you can vary this value
        running: true
        repeat: true
        property bool toggled;
        onTriggered: {
            toggled = !toggled;
            loader.sourceComponent = toggled ? null : videoContainer
        }
    }

}