bug, quest 'Walking the Graves"

During Emmrich's quest "walking the graves" there is a door that requires a wisp. The First wisp closest to the door Emmrich shoos away no matter the dialog options. If you run to the wisp prior to  Emmrich reaching the wisp, the wisp will not follow you.  The second wisp that shows up around Manfred goes into the ground after Manfred is told to move, and will not follow you either. After the quest is over the door and the wisp receptacle disappear.