Not working properly

Once i open it everything looks fine but when i opened one of my word everything was destroyed then once i press pause to save and quit it kept loading for ages sometimes when i dont have internet it always lags when i touch play beta it lags for a long time then shows me my worlds but i still cant touch it also once i press sign up for xbox my mcpe closes and reopens so i cant really go to servers anymore neither play with my friends from a far away please fix this.