embedding a Qt3DWindow inside a QMainWindow causes crash upon delete

See attached example for crash in Qt3DCore`Qt3DCore::(anonymous namespace)::InternalEventListener::eventFilter(QObject*, QEvent*) + 99
when a Qt3DWindow is embedded within a larger QMainWindow, and then updated (replaced) or the overall window is closed.

My app has Qt3D panels in tabs within an overall main window, so this is a complete blocker for me.

I also have a problem where the window does not even render unless there is another such tab present (and then it complains of FBO incomplete until I toggle between the two tabs), but I'm not able to replicate that in the standalone test case – will investigate further.