PySide2 applications with items in scene(s) freeze on exit in python3.7+

In python version 3.7 upwards, populating a scene with items* before exiting the application leads to the application freezing after the main window closes, and does not exit properly.

There is no output when this happens, the execution stops after the closeEvent for the main window returns.

Please note that closing the application without adding something to the scene does not result in a freeze.

I have attached an example application with a few comments. Please let me know if you need anything else / if I have forgotten something.

*I have tested this only with widgets, but I think the behaviour should be the same for all items.