Some demons and angels automatically attack oppositely aligned priests, including healer mobs scattered around the world. But they can't actually attack a healer, just like a player can't. So, it looks like this:

A winged morosa demon snarls with rage and bounds towards the healer and attacks!
The healer yells 'Help! I'm being attacked by a winged morosa demon!'
The gods protect the healer from a winged morosa demon.

Over and over, as long as you stay near the healer. It's normally not a big deal, since you're just running past the healer, or using it for a quick refresh, or whatever. But this time, my demon started trying to attack, and just woudln't stop. It was still bound, but wouldn't follow me away from the healer at all, or stop trying to attack every few seconds. I eventually dismissed it, but I'm sure you can see how irritating this was for everyone else in the city, and of course it made the demon useless for the rest of it's timer too.

n/t