Great game but...

Great game, absolutely love it, but every time I go to sleep(in the game) or exit the game to reply to a text or do something else on my phone, the game deletes and item from my inventory. I didnt notice at first because it only deletes one at a time, but I deleted the only diamonds I had, my bed, my MAP to know where I was at and all my food. Please fix this bug, I need all my stuff to stay where I put it?

Conceding about Minecraft: Pocket Edition, v1.1.4