Destruction of Items

Entered my world, I realized the disappearance of the bed, my anvil, and 4 chest. I also lost some items in the chest, like 45 pieces of leather. Then I realized that a chest had remained, and inside I had sorted some minerals, which promptly duplicated themselves in the previous chest. So I exploited the bug and I got it twice as long as I had lost a lot of other important things, like 30 cobblestone stacks. Please solve because it destroys the contents of the chest and sometimes does not even duplicate ...
I naturally tried to redo the operation after doing a game session, but the same bug always came back to me ...

Unfortunately I have no examples to show you.
Thank you