This bug has appeared in both the Northern and Southern Shiverpeaks. Your party dies but when you rez, some of the npc's go running off away from the rez point by themselves (I assume back to where the party died). Also, numerous times after rezzing in this area an NPC will be floating in the air and will not move from that point. The only times I have seen this bug was in the Shiverpeaks so I'm guessing it has something to do with the mountains.
Don't even get me started on how stupid the AI is for Alesia, that worthless #!*@$.