With PyQt5==5.7.1 importing `QtQuick.Dialogs 1.2` prevents window from opening, does not happen with `qmlscene`

main.py

#!/usr/bin/env python
import sys

from PyQt5 import Qt, QtCore, QtGui, QtQml, QtWidgets

QML = b"""
import QtQuick 2.7
import QtQuick.Controls 1.4
import QtQuick.Dialogs 1.2

ApplicationWindow {
    visible: true
    width: 640
    height: 480

    Text {
        text: "hello"
    }
}
"""

app = QtWidgets.QApplication(sys.argv + ["-nograb"])
engine = QtQml.QQmlApplicationEngine("Main.qml") # Does not work
# engine = QtQml.QQmlApplicationEngine() # Works
# engine.loadData(QML) # Works
sys.exit(app.exec_())

Main.qml

import QtQuick 2.3
import QtQuick.Controls 1.4
import QtQuick.Dialogs 1.2

ApplicationWindow {
    visible: true
    width: 640
    height: 480

    Text {
        text: "hello"
    }
}