I had logged out of the game for a short break, when I logged in I happened to have been next to a zombie and it hit me immediatley. I didn't have much stuff so I let the zombie kill me and I started over. I respawned in the marshland area. I played for a while, I think 30-40 minutes. I had picked up some stuff some things like a bag, compass, food, and some other random items. Then I had a friend log in, so I logged out to get on the same server as him. We played on the same server for just a few minutes and that server froze/crashed. I had the yellow chain icon and I couldnt interact with any objects in the world. So he and I swapped servers to find one that wasn't crashing. When I logged in I was rolled back to my previous life, bleeding and no stuff. I just continued playing but other server swaps did not roll back.