Thanks for project sample.
Unfortunately, I was not able to see a crash with this. On my first attempt editor froze and that was it. I had to manually force close with Ctrl-Alt-Delete. next time I loaded up I’ve been able to use your instructions and have not had an issue as of yet.
It looks like this will need to be looked into a little bit more. So far I’ve start and stopped (after everything has landed and stopped moving) about 30 times in a row with now crash.
I’ll continue and see what I find. At moment it’s not turning up anything that is similar to what you’ve gotten, unfortunately.