Yesterday, PUG group did path 1 and path 2.
Hodgins could not initiate the scepter collection task, basically he could not open the door of scepter room.
Detha could not initiate the mortared room tasks, basically the NPC did not show up.
So let these NPC die by graveling, kohler etc. These NPCs are come to designated place but does not start the tasks.
I never had such bugs, but I suspected in this pug group there were guy with [sunrise].
Hope, the legendary are not causing the dungeon NPC bug.