In the last few days I've had issues that I have never seen before in minecraft. A friend and I play using his single player world so we do LAN. However, every couple of logins to his LAN server, I have been getting completely reset and placed back at the servers original spawn. This happened to one of my other friends too. However, the account the server was tied to was still fine and everything was retained. So its only affecting those that connect to the LAN world. Anyone know whats wrong and how to fix this? It's so frustrating joining his world and then seeing my inventory cleared and im back at the spawn. (The buildings stay and stuff its just the individual characters and inventories)

Thanks!