Quest bug in the Necropolis Halls - Restless Sprits

Hello, I've done this quest earlier today with a different character with no problems. I'm am to gather the 4 wisps and use them to put in the 4 receptacles to open a door. I gather  them and when I took the 4th to door the skeleton went through the motions of unlocking the 4 chain but the wisp didn't disappear from me so it did not unlock. I tired going to get the 4th one more time but  same thing happened. I was standing right along side of the 4th receptacle when I happened. 

After I closed down the game and went back in I now show 4th receptacle as needing a wisp. But when I used Emrich's ability to create the giant there is no wisp on top of it.