This seems to be happening a lot at high altitudes lately. Something got messed up in the last couple of updates. I haven’t seen it happen to the red dragon like you mentioned, but if what Taemien said is right and a server restart cleans it up for a while, then it’s logical that I probably wouldn’t. Being on single player, my server basically gets restarted every time I leave the game. :face_with_diagonal_mouth:

Come to think of it though, I do remember thinking the NPCs seemed “sluggish” in one of my more recent sessions, and I wasn’t up in the mountains at the time.