a Multiplayer Gamer can lost all ingame progress and Inventory .

1.) Start the Multiplayer seesion at a Xbox Series X and play with other Players a wile, save and close the game.

2.) Start with the same Account the Game on a Xbox One new and walk a little bit time . Close and Save .

3.) Start the Game new on the Xbox Series X, and the last other Players join back and lost all Inventory and Stats.

The same problem is, the Player join over the Ingame ( MP Service ) to Private Multiplayer Session, he starts without nothing.