PvP Thralls, brief damage immunity glitch

I play on PS4, although I would imagine this is an issue on all platforms. When you first engage the Thrall camp, and the NPC does that little roar/squatting to take a dump animation, more often than not he is immune to most attacks. It doesn’t say “IMMUNE,” or anything, but basically your hits just don’t register until he is done pooping.

Not the end of the world, but by no means is this working as intended.

They also do this bizarre “Teleport to location X” glitch sometimes when initially engaging them as well.