Well it doesn’t happen always, but has happened once at least. Not all bugs happen consistently, i don’t know why thats the point.
I’ve actually spectated another bwl and saw it in firemaw too, but a quick taunt of a tank masked it, so it wasn’t so noticeable. In the image i showed, the quick taunt was resisted so you see the full effect even though tanks have more aggro than dps.