I was on creative mode and I travelled to the end dimension. Everything seemed pretty normal but then I saw the end exit portal twice: one in the normal position and one at y=0. I travelled to the second one and looked down and saw a stationary ender dragon flapping violently at lower than y=40 (The void barrier which can’t be passed through without commands). I wrote in chat ‘/tp @e [type=ender_dragon] @s’ and both dragons teleported to me. The original one flew back up to the top of the end but the second was stuck in the void, flapping. I hit it with my sword and eventually it was out of the void but then it started rising into the air randomly. I don’t know how any of this happened. It might be a one-off since I haven’t checked any other worlds for the same glitch but it isn’t that noticeable unless you actually travel to y=0. I’ve attached a bunch of pictures as proof. (I couldn’t add the clips I recorded because of the mojira file size limit.)