After defeating the Enderdragon in creative the animation was fine. While i was looking for the end gate i happened to look up and a light flashed. I looked around again and it flashed again. I have to look at a certain angle looking up but not looking strait up for the light to stay. Its the light from the dying animation of the Enderdragon but only the light nothing else. Also the healing crystals were aiming at the center of the light even though they were broken.