Qt3DExtras::Qt3DWindow crashes when deleted

I have for example a QMainWindow, and I noticed that if I call in the constructor : delete new Qt3DExtras::Qt3DWindow the application is crashing. Also if I just create the Qt3DWindow in the constructor of QMainWindow and destroy it in the destructor it's also crashing. My impression is that Qt3DWindow crashes all the time when destroyed.
[My target is to be able to dynamically create and delete widgets that contain a qt3dwindow, without memory leaks. And so far I notice that because of qt3dwindow crashing, also the coresponding widget is crashing when destroyed: ]