Board Thread:Questions and Answers/@comment-27932303-20160309045921/@comment-26859294-20160329133329

This sort of thing has happened to me before and can be caused by a few reasons.

1. Consider how old your world may be. The suden patchyness could be the update trying to insert new mnerals and such.

2. Sometimes on andriods worlds get mixed up. This happened to my faveorite world a while back it was acting just like your and then it turned into a copy of another one of my worlds completely confusing the game.

These could possibly be your problem and there isn't a fix I have heard of. BUt ask arround others might know.