This is the first time I've seen this but I opened my survival world and was met with a complete reset of my character progress. It was like I was new to the world because I spawned in with a empty map and no levels at the world spawn. The world itself was how it was before I closed the game last because I had the walls I created last I was on. I closed the game entirely without saving and reopened the game. This time I opened the world in my home and with all my items. I reported as soon as it happened so I have no idea if it'd happen again. Thank you for the read let me know if there is more I should say.