Put the summary of the bug you're having here
What I expected to happen was...:
I decided to go fight the Ender Dragon on my survival world and thought nothing random would happen.
at actually happened was...:
When I went to fight it the ender dragon kept circling one of the towers. Every time I leave the game and come back the dragon is it full health. I ended wasting my arrows
Hey there!
This doesn't sound like a bug. Sometimes the Ender dragon will do this and It's just normal behaviour. However, If you still believe this is a problem, could you possibly attach a video so we could see the bug in action? If you don't have a recording software, I'd recommend using OBS as it's free and easy to use. Hope this helps!