AI packages fast-forwarding does not take in account physics intersections
In this case, repeated training from Vinnus Laccinius in Ebonheart's Six Fishes sometimes trapped him in a door's geometry, where he predictably spazzed out. The engine does make an effort to push him out, but it's possible this sometimes won't work. It can also place them inside the player.
(RM-4249 from redmine: created on 2017-12-07 by August Avatar, )