Highkeep
 

While killing guards in Highkeep, randomly the guards will become unable to be attacked, cast on, send pet after etc. The guards do it while running away, and while having enough HP to keep on fighting. They do not despawn and will not respawn either. Hobby came in and summoned Guard Dister (who ran away and this happened) and Guard Handy, who ran away from me at 40% HP and then became impossible to attack.

Not sure what causes it, but it appears to be random.

Bump since this is relevant to the Blackburrow post.