Hello , , ,
Sorry to hear about the crashes and recommend you add a TdrDelay and see if that helps avoid the crashing issue. https://twinmotionhelp.epicgames.com/s/article/Video-Card-GPU-Crash-during-export-using-Path-Tracer-Long-computation-times-TDR
If that did not help please report a bug/crash so we can properly investigate and follow-up. Here is the link to submit a bug: https://twinmotionhelp.epicgames.com/s/case-community-page
Kind regards.
Vincent B.