Items not positioned correctly if moving multiple items to the top of a ListView

import QtQuick 2.0

Item {
    width: 500; height: 500

    ListView {

        id: view2
        width: 240; height: 320
        x: 100
        y: 100

        model: ListModel {
            id: model2
            Component.onCompleted: {
                for (var i=0; i<30; i++) {
                    append({'name': 'item ' + i})
                }
            }
        }
        delegate: Rectangle {
            width: 200; height: 20; border.width: 1
            Row {
                Text { text: name + " : " + index + " : " }
                Text { text: " " + parent.parent.x + ", " + parent.parent.y }
            }
            objectName: name
        }

        focus: true
        Keys.onSpacePressed: {
            model.move(10, 0, 2)
        }
    }

    Rectangle {
        anchors.fill: view2
        color: "lightsteelblue"
        opacity: 0.3

    }
    Text { anchors.right: parent.right; text: "content y:" + view2.contentY + ", count: " + model2.count }

}