Regression (Qt >= 5.12): Buttons in QML Dialog require two mouse clicks to trigger when opened via Platform MenuItem

import QtQuick 2.13
import QtQuick.Window 2.13
import Qt.labs.platform 1.1 as Platform
import QtQuick.Dialogs 1.3

Window {
    visible: true
    width: 640
    height: 480
    title: qsTr("Dialog Focus Bug")

    Platform.MenuBar {
        id: menuBar

        Platform.Menu {
            id: fileToolButton
            title: "File"

            Platform.MenuItem {
                id: importMenuItem
                text: "Settings"

                onTriggered: dlg.open()
            }
        }
    }

    Dialog {
        id: dlg
        title: "Settings"
        standardButtons: StandardButton.Ok | StandardButton.Cancel
    }
}