Regression: First item in Tumbler disapperas

import QtQuick 2.5
import QtQuick.Controls 2.0

ApplicationWindow {
    visible: true
    width: 640
    height: 480

    Rectangle {
        height: tumbler.implicitHeight
        width: tumbler.implicitWidth
        anchors.centerIn: parent
        border {
            color: "black"
            width: 1
        }

        Tumbler {
            id: tumbler

            anchors.centerIn: parent
            model: [0,1]
            currentIndex: 1
        }
    }
}