Hey, so this has happened twice and I'm not sure what's going on or how to fix it.
A friend of mine started a server, and I was given Friend Access. I opened it once through my account, and after getting on both of us respawned at the starting point, not where we had slept. In addition, both of our inventories were empty, our XP had been reset, and we had lost all of our achievements. However, the work we had done in the world and the items in chests all remained the same. We assumed it was because I had used Friend Access, as before they had always been the one to start the server with no issues. After this, the server was always started from their account, and everything seemed fine.
Today, we both made custom skins and realized that our server was on cracked, so they turned cracked off. When we both got on after, they had lost all of their XP (they were originally around level 30), spawned in a random location, and their inventory was completely different, my XP had reset to level 2 (before this I was at 15) and my inventory had returned to what it was earlier in the game when I was at level 2. Again, all items in chests and everything we had built was perfectly fine. I lost the one dog I had standing, but all my dogs that were sitting were also unaffected.
Neither of us have any idea what happened and are very much lost. I suspect it might have something to do with the server not being backed up in Google Drive, but no clue. Any ideas as to the cause or solutions would be greatly appreciated!!
