Items dissapearing from chest

This is the second time it's happening to me. It's exactly the same of this other issue reported, but already closed, MCPE-8373. Torches, sticks, and diamond pickaxe simply dissapear from chest after some game crash. This time it happened when I was leaving the Nether. The game closed, and when I reopened it, I was still in Nether. This time leaving the Nether the game didn't crashed, I got home, and checked the chest that was nearly empty. Note that only a few items do dissapear, because I made and stored a diamond helmet at the same moment as the pick and it was still there after the crash. Also if there's some way to retrive the items to me I would be very grateful, because is SO hard to find diamond and I was so happy with my enchanted diamond pick. Thanks for your attention.