Ever since I bought my realm, it hasn't saved my data past a certain point. I have lost hours of work and tons of items. This has happened twice. After the first time, I got on again and regained the items I lost and made even more progress in my survival world. However, once again I have spawned in the cave I had been exploring the day prior with less materials. (I should've had 10 diamonds but I had 2).

The data in the statistics is also incorrect and doesn't represent the events that occurred in the lost progress. For example, my number of deaths is incorrect. And so are the achievements. Shown below are the achievements I currently have trying to regain my progress for the third time. I should have the "return to sender" and the achievement you get for going to a bastion remnant. 

What I expected to happen was...:
To spawn where I last logged off of the game, which was inside of the house I built.

What actually happened was...:
I loaded in the middle of the cave I was exploring with less items than I had before. I never closed out of the game where I loaded in. 

Steps to Reproduce:
1. Leave the realm for a long period of time
2. Rejoin the realm