All items disappeared upon login

My wife (Muffy2 or Microsoft account MuffhammadAli) is the primary for this world. I am always player 2.

 

First, i had trouble logging in at all. When I did get logged in, all my gear was gone. Enchanted Netherite armor, weapons, and tools. 3 shulker boxes full of stuff. Everything.  I had only a map, which was in a primary hand slot, not my off hand, and wasn't even the map that I had when I last logged out. Some stuff explored on it, but not what I had. Not to mention, my Ender Chest is now empty. It's as if the game thinks I'm logged in on an entirely new account.