Hi! Thanks for the report, you’re actually the first person to mention this, so I don’t have a confirmed cause yet.
For now, a good workaround is to save your game regularly and, if it crashes after a long session, just reload the save and continue playing. That should let you play without losing progress.
I’ll keep an eye on this and try to reproduce it on my end. If I can track down the cause, I’ll push a fix as soon as possible.
Thanks again for letting me know!