I am playing Bedrock on XBox One. version 1.19.6301.0

When loading my existing world I am spawned in as a guest at world spawn with a starting map and a bonus chest.

This occurs not every time, on occasion I am loaded as my normal profile.

I have saved a file after playing for a few minutes and then spawned back in as a new (different) guest, as I was back in the world spawn with only those starting items.

This affects my main save and backup, also saves on other worlds.

I have tried deleting and re-installing minecraft, this did not help.

Is the problem on my console, should I delete saved data?

I have been reluctant to do this in case I lose my world. I have been playing this world since 1.15 and don't want to lose it.