I have searched and not found this exact issue so I apologize if I missed it. I recently upgraded to Realms. I uploaded the world that my son and I play on. He plays on Windows 10 and I play on Xbox One. I have purchased three different versions of Minecraft but did not create a separate account. We normally play on LAN. When we play our usernames are Mohohunter and Mohohunter(2). I uploaded the world and when I loaded into the game it loaded his profile instead of mine. Also it would not let both of us play at the same time (same account and I understand this). We decided to go back to playing on the LAN but now even on that we both load in with his data(same level 2 character, same inventory and same location). After we load in anything we do individually is saved but everything I had before on my player is gone. This includes my 63 levels, enchanted diamond and netherite gear as well as everything inside my ender chest Most important is the ender dragons' egg(I have whatever was in his ender chest). If I download the world from realms the issue still remains. This issue is duplicatable if I upload another of the worlds that my son and I  play on. I am just trying to see if there is any way to get my player data back. This is a survival world so I am very disappointed at the hours upon hours of work I put into getting those things only to lose it all. Thank you.