Hunger Bar not regenerating past 3 bars, even after eating food

When I transferred my world from Minecraft: Xbox One edition to the Windows 10 edition, my hunger bar will not go past 3 bars no matter how much food I eat. I would like to sign up for realms and transfer my server there, but I do not want to do that until this issue is resolved. The only time I have full hunger is on peaceful, but on a difficulty, it never goes past 3 and rapidly depletes.