Potion Effect Button Not working

The New Potion Effect Button On The Right Of The Screen, When I Click It It Does Not Open The Tab, But If I Click Under It, Way Way Under It, If your Lucky, It Works, Same Happens On Servers, And When I PvP, It Open Because My Finger Is At The Bottom, And It Keeps Opening, Please Fix This, Because When I parkoure On InPvP, It Maked Me Fall In The Void, And When It Opens And You Are Walking, It Keeps You Walking! In 0.11.1