Scoreboards not saving to player

A friend and I were making a money scoreboard, I gave me and him a score and when I left and joined back we no longer had our scores, and our scores were saved under "Player Offline" He is on Xbox, I am on windows 10 and I'm not sure how to fix it. It won't happen on a single player xbox but it will on windows 10. Still happens after I remove and re-add the scoreboard, and it's happening on multiple scoreboards, and on multiple worlds.