There seems to be a relatively reproducable crash occurring recently involving the accidental duplication of tomes.
When someone dies with a tome and grim on them, sometimes when they respawn they are still carrying the tome which effectively places 4 tomes into the map, thus when someone picks up the final tome or rescues the person who died with the tome the game seems to freak out and immediately CTD. This has happened three times in the past week to me and I don’t know what is causing people to keep tomes after death but it is essentially making a lot of high difficulty public runs unplayable due to this crash.