Deployed quicknanobrowser crashes on Windows

Example quicknanobrowser crashes if it is deployed by windeployqt on Windows.

Problem is around the following part of the examples/webengine/quicknanobrowser/main.cpp

appEngine.load(QUrl("qrc:/ApplicationRoot.qml"));
QMetaObject::invokeMethod(appEngine.rootObjects().first(), "load", Q_ARG(QVariant, startupUrl()));

appEngine.rootObjects() is empty. It seems the QQmlApplicationEngine::load() function is not done when appEngine.rootObjects() is called.