Map tiles are sometimes grayed out when other controls have focus

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"
        }
    }

    footer: Button {
        text: "Popup"

        onClicked: popup.open()

        Menu {
            id: popup
            modal: true

            Repeater {
                model: 10

                MenuItem {
                    text: "Test"
                    onClicked: console.log("Clicked")
                }
            }
        }
    }
}