when i join my world its either brand new like if it were just created without anything. and its for all my worlds and realms. pls fixs this bugs.

I made a new world on the newest update and once i was done playing on the world i saved and quit. By the next day i loaded into the same world and it was as if it didnt save at all even though it said autosaved. It put me right back in the beginning where i spawned with no progress from the past day that i played. then when i reloaded the world over and over again it would load me back to the real saved game as if it was back to normal. But then it would happened again. please fix this.