flick() does not work correctly with ListView

import QtQuick 2.0

Item {
    width: 400; height: 400

    ListView {
        id: listView
        width: 350
        height: 400
        model: 100
        delegate: Rectangle {
            height: 40; width: parent.width
            color: index % 2 ? "lightsteelblue" : "lightgray"
        }
    }

    Rectangle {
        width: 50; height: 200
        color: "blue"
        anchors.right: parent.right
        MouseArea {
            anchors.fill: parent
            onClicked: listView.flick(0, 1000)
        }
    }

    Rectangle {
        width: 50; height: 200
        color: "green"
        anchors.right: parent.right
        anchors.bottom: parent.bottom
        MouseArea {
            anchors.fill: parent
            onClicked: listView.flick(0, -1000)
        }
    }
}