Minecraft Survival World joined into, lost all my inventory, spawned at the world spawning point even though I did not die.

As joining into my minecraft survival world as per usual, once I joined in I figured out that I was back in my world spawn point. Realizing as well that I had nothing in my inventory. This same issue happened in a different survival world as well, and I did report it too. I tried getting back to my base, to see if my stuff was there, but it was not so maybe it despawned or really just disappeared after a joined into my world. If by any chance I found my stuff, unfortunately my achievements would be not be on anymore because I would have had to gone into creative mode to retrieve my stuff. Please fix this bug, it is really frustrated especially if you had a Minecraft world you’ve spent ages on.