I think I saw this during mod15, but I've been seeing it more in mod16. Basically, on logging into *some* Dread Ring instances, there are multiple immolation spirits just hanging out at the campfire. I've seen some in undermountain as well, but don't have screenshots I strongly suspect that this leak of entities is adding to the server load and could increase latency for folks. This afternoon (~1PM Central, Sun May 5th), I counted 6 unassociated Immolation Spirits in Dread Ring #1:
I tried to get a good screenshot here, showing that there were no other players around to 'own' those, etc.
Dread ring instance #2 was clear of such spirits. Didn't cycle to more instance(s) to check them.