So I've run into an issue where if party members die by falling into chasms or unwalkable areas (dang you unstable bridge by the caravan) you can not always revive the party member as they end up in a block off geometry. The little soul echo is unliving happily half in a boulder.
I had this happen with one of my characters in the goblin camp and it 'default spawned' them in the treasure room, also saying that I was blocked from resurrecting them.