It isnt just prowl anc cower that are haveing buggy performance. I have on my pet bar, Growl, Cower, Prowl, and Dash. I leace Claw, Rake and Rabid on auto cast in the spell book. I have noticed several occasions where they will get turned off. So the bug is not limited to prowl or cower, anything in the pet spell book appears to be capable of flipping out.