Bex randomly disappeared for me alongside with Halsin, however, I didn't notice for a long time as this was Durge. I'm not sure what happened to her, as I never found a corpse. The other NPCs do not comment on the disappearance. She did survive the attack on last light 100%, but she was gone by the time I rescued the Tieflings. I never got her cookies. I don't know what it is with this patch.