Put the summary of the bug you're having here

What I expected to happen was...:
When the game opens from a save the previous sessions experience points should be present.

What actually happened was...:
While rebooting and playing the game, experience randomly drops without dying. 

Steps to Reproduce:
1. Open a survival world (possibly needs to be one prior to 1.16)
2. Play for a short while and observe experience dropping

3. Quit game and reopen to see experience has dropped.