Try to go into her cell within the prison and initiate a conversation with questioners Sumera and Jasin. I had a similar issue with Z'rell where she just got stuck at Ketheric's throne and wouldn't move, but when I went up the stairs her cutscene still triggered properly and then she went on with her regular routine.
Or try to move her with Minor Illusion or by playing music to her. Unfortunately Patch #7 broke some pathfinding for NPCs, so they tend to get completely stuck and need to be moved with spells or music.
