I just had a similar crash last night playing Borderlands 4 with my son. We just finished the Takedown at Hadron Abyss and I opened the 5 chests and a pearlescent weapon popped in one chest. Crash just like that one and lost all of the loot. I am not happy.
Calling pendragon1 ignorant is laughable at best. He is one of the more well-respected posters on the forum and knows exactly what he is talking about.
That poster has spent the entire year he has been a member here telling everyone else how dumb we are because we all understand what a GPU bottleneck is.