There is a well-known problems with "sitting" NPCs, colliding with furniture in this plugin.* Animated Morrowind - Merged (<- Again, wish I didn't need to get rid of this.)
I had to disable problematic NPCs (sitting readers, writers and eaters) to use this mod with OpenMW.
But even in this case you will have to use 0.43 (a problem with musicians animations was fixed recently).