Yup! That's exactly what's happening. My Revenant hears voices, gets annoyed to the point of killing someone, and then goes out and kills someone. The typical solution in this case would be making the 'someone' you go kill after getting annoyed be yourself, but since respawning is a thing that doesn't work. To find a more permanent solution we must go to the source of these Legends and kill that instead. We have to kill the Mists. Which ironically is what Kralkatorrik was doing before we killed him. Funny, that...