Lost clicks on Android Qml applications using Map

import QtQuick 2.5
import QtQuick.Controls 1.4
import QtLocation 5.6

ApplicationWindow {
    visible:    true
    width:      640
    height:     480
    title:      qsTr("Hello World")

    Map {
        anchors.fill:   parent
        plugin: Plugin { name: "osm" }

        Button {
            id:     button1
            x:      100
            y:      100
            text:   "Button1"
            onClicked: {
                console.log("Button1 clicked")
                button2.visible = true
            }
        }

        Button {
            id:         button2
            x:          200
            y:          100
            text:       "Button1"
            visible:    false
            onClicked:  visible = false
        }
    }
}