@HighSaint I’ve had some time to jump on a few servers. I went back to an old one I played on and found a base that dropped my frames from 60 to 10. Logged out and then back in with no crashes unlike my singleplayer save, which wasn’t dropping frames in either base I’d built.
Because I’m playing on the Microsoft Store version I’m not even sure if I can get creash logs, let alone my save file. I’ve scoured my local game files and found nothing that matches up with what my friend on Steam said his logs and save looked like.