Map location jumps after closing popup menu

import QtQuick 2.7
import QtQuick.Controls 2.0
import QtQuick.Layouts 1.3

import QtLocation 5.9
import QtPositioning 5.8

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

    Map {
        id: map
        anchors.fill: parent

        plugin: Plugin {
            name: "osm"
        }

        MouseArea {
            anchors.fill: parent
            acceptedButtons: Qt.LeftButton | Qt.RightButton

            onClicked: {
                if (mouse.button === Qt.RightButton) {
                    showMapPopup();
                }
            }

            function showMapPopup() {
                mapPopupMenu.x = mouseX;
                mapPopupMenu.y = mouseY;
                mapPopupMenu.open();
            }
        }

        Menu {
            id: mapPopupMenu
            modal: true
        }
    }
}