Item.layer: true inside Column triggers bad positioning

        SimpleMaterialItem {
            layer.enabled: true;
            width: parent.width;
            height: parent.height / 3;
            color: "white"
        }

    Column {
//        anchors.fill: parent
        width: 300;
        height: 300;
        x:0; y: 0;

    Column {
//        anchors.fill: parent
        width: parent.width;
        height: parent.height;
        x:0; y: 0;