I have the pocket edition on my iPad and for some strange reason, while I'm playing, half or whole buildings of mine occasionally simply vanish.
I have looked for similar complaints everywhere but no one seems to have the same problem. I'm getting really tired of it and wish I knew why this is happening. I am also on creative mode so it has nothing to do with dying.
Best Answer
How much free space do you have left on your iPad?
I'm not familiar with the way Minecraft PE stores level data, but it seems that the game is failing to commit chunks to disk properly. When the game tries to reread the chunk, it either fails to find it or finds it's corrupted and regenerates it, thus leading to vanishing portions of buildings.
(Think laying your Minecraft world in a map with latitude and longitude lines. Those lines split the map in a bunch of squares that are called "chunks" in Minecraft.)