Bump I'm having this Same issue.
The only way I can NOT crash is just by letting that party sit there till the end of time and NO one else attacks it it just lives there annoying me floating ... ready to crash me at any point.
Summary: After obliterating the Conspiracy War Party and looting them - I crash.
How to Reproduce: Beat the three party's with AutoBattle, then beat Conspiracy War Party with AutoBattle and Swap all loot
Have you used cheats and if so which: None, also unmodded
Scene Name (if related): None
Media - if need be I can record it
Computer Specs:
OS: W10
GPU: 1080 TI
GPU Driver Version:
CPU: AMD Thredripper
RAM: 64GB
Motherboard: Asus somthing or other
Storage Device (HDD/SSD): SSD 1TB