All my stuff disappeared from my chest my diamond and iron are gone

Put the summary of the bug you're having here
My stuff was in my chest I got off then I got back on and my diamonds and iron were gone
What I expected to happen was...:
Describe what you thought should happen here
When I broke the chest I thought the diamonds and iron would come out
*What actually happened was...:*nothing came out
Describe what happened here

Steps to Reproduce:
1. Put a step by step guide on how to trigger the bug here
2. ...
3. ...