I should have reported on earlier versions, but after using my profile on Android, the Xbox can not retrieve the data properly and corrupts it and vice versa.

-I lose my skin on my character - one of which I can't retrieve anymore
-I lose my character data in certain worlds, including inventory. Spawn is usually not affected, but has in one instance of on 1.16.0.67.
-On Android, my character's inventory vanished on a world I created on mobile. This was right after the update to 1.16.20.52. Skin data was lost as well, recreated, and then corrupt upon signing into Xbox version. Quitting the application on Xbox corrected the skin data.
-Both devices are running the same version.
-Both devices use the profile to play on another world regularly. This has happened from time to time there too.

I'm uncertain if it is related to the sign in issues. This does not happen everytime, but in about 6 or 7 instances. It is not related to updating and has been an issue since.

Update 7/25/2020: Bought a New Xbox One. Installed and updated MINECRAFT to latest beta version. Lost my skin data again. Got a message that Global Resources failed to sync properly.

Tried to pull up on my Android 9. Skin data was still gone.