Played a battle against the Dark Elves with Azazel. While Azazel was on the ground I gave a move order to fly away from combat. He started flying up in the air and before he got to the max fly height he got hit by a Bloodwrack Medusa. This then caused him to get stuck in a weird animation loop where it looks like he's constantly getting hit. Wouldn't take move orders, casts, or anything. He was just stuck for the rest of the battle.
This probably isn't just limited to the Bloodwrack Medusa unit hitting him but any large artillery projectile. This just happened because the medusa unit is much more accurate.