A few months ago right after the Better Together Update, I logged onto my really old minecraft world on my iPad. I created it on my iPad a couple years ago. It was created before the infinite world option was added on PE so it was the small world type. I had a house a couple blocks away from the border and it completely disappeared. It's like the border moved closer to the middle of the world and swallowed it up. I can still see the outline of the blocks and can see my cat and torches, but not the blocks. I can travel past the border where its just sky and can still walk around, but its all sky. It did this around my entire world and shrunk it. I logged on my Iphone 5s, Iphone SE, Ipad 2, and windows 10 edition pc and it was gone on all versions  If you can provide any help that would be appreciated. Thanks - Dallin.