Put the summary of the bug you're having here

I was fighting a creeper, and all the sudden the game crashed. I was about to kill the creeper, but the game crashed on me. I was just finishing a mass mining session with a haste 2 beacon, and when I got to the surface, I was fighting mobs, then it crashed.

I have no idea how to recreate this bug, but I think it may have to do with floating entities, and dropped items