MaxJay

"I watched a YouTube the other day and he said the reason y it does not sync they changed something. If you look on the file of Minecraft on the Xbox and look at the app model. They have changed it to GDK. That is what I causing the issue."

So they changed something...  it's still an issue that needs to be fixed.  You can't just leave a game broken because you decided to change something.

Same thing for me.  I was just sent to spawn for no reason.  No death message, nada in my inventory.  I got back to my base grabbed some gear from a chest and saved and thought that was the end of it.  Saved my game.  Next day I come back and all of my original stuff is back in my inventory and I'm at a different load point than when I saved.  It's now alternating every time I load my game between these two states.  Huge HUGE bug!

It's been an ongoing issue for me too.  I lost a world that I had been building with my children for over a year and it's happening on our new one too.