We started a new world less than a week ago on our Xbox One S and played for a few hours. At one point we all left the world to go eat lunch. Two of us were logged in as guests and the other was on the main account. Then when we came back in a few minutes, the main account was just fine while both the guest accounts appeared to be new players. After leaving the game and rejoining about 3 times, it finally put us back as the 1st version of the guest account. Since then, this has happened almost every time we play and it's getting old. It has also only happened recently, we have never run into this issue in the past.