VM returns me to the login screen

[PGuin]

I'm running a program and when doing so, it consistently puts me back to the login screen and anything I had going on (open terminals, processes) are gone and it's like a fresh login. I'm running a Fedora 40 linux guest.

If I run this program in single processor mode, no problems. If running with multiprocessing, it will return back to the login screen. I've had it fail multiple times. I've watched the memory but no problems (32 gb) and disk space is the same, looks great.

I'm working with Python multiprocessing and have been doing this for many years and have had no problems. I've looked at the logs in VM directory/logs and to my mostly untrained eye, don't see anything that says kernel panic or some such.

I'm not even sure if it's a Linux issue but did use dmesg and didn't see anything of note. What information should I be looking for to narrow down this crash (if that's even the right word)?