All items disappearing after logging out of world

I played MCPE yesterday and logged out of the world with save and quit. While I was playing, I took a screenshot to remember the location of my base.

 

Today, when I logged in into my world, I found that all my items, including all my armor, my shield and others have disappeared. I am reporting this bug 5 minutes after the discovery.

The two screenshots I have provided are before and after the bug occurred.