GRAPHIC BUG - a dark ring created around player , no visibility after the ring!

Hi dear developers ,I have found a huge graphical error in the new mcpe 0.15.0 alpha build 1. In the error, every time i join a world a dark ring(multicolored : Red ,Black or Green) surrounds the player and the ring extends till infinity which creates a dark area around the player. Please send a solution to this error soon (in the beta build 2, if possible) because it intrudes my game play and am really fed up of this bug!! I have already tried out restarting my device(and game) and I have also tried clearing the game data(cache and other settings) but this glitch occurs on every setting. Also the pattern(of darkness) changes from time to time, I am attaching some screenshots which may help. THANK YOU!!