Game crashes when attempting to go into a world over 80 MB

My Minecraft world was perfectly fine until it's size went over 80.0MB. My world always crashes upon entering. It took 3 tries to go into it. I have tested it with other worlds and it had the same effect.

Devices Tested:

iPod Touch 6th Generation - iOS 9.2.1

Affect Version:

MCPE 0.14.0