Crash while farming for maggie, any help?

So, as you all know, when you quit the game while doing the cistern of slaughter the WHOLE quest fails, anyways, i wanted to farm the maggie, BUT, when i kill Tremendous Rex and die so i can respawn at round 5 the game simply freezes at the death screen with the little white squares, so i have to use task manager, kill the task and do ALL that over again, it would take 2 hours per run and that’s just absolutely ridiculous for a CHANCE of it to drop, any help? (i can die and the game works just fine until the last round/after i kill TR)