World's not loading, requires multiple restarts

Green bar doesnt move for a prolonged period of time and requires multiple relaunches or complete closing of the app

This issue doesn't effect the game (survival/creative) just and extreme inconvenience

After choosing Cheats Name Difficulty Ect… and booting up the map it functions fine it may be a problem with my IPad or a problem with the severs but the bar stays Grey and is difficult to boot up.

PLEASE FIX THIS ISSUE!!!