Changes player's names

Hello. I've been playing Minecraft for a long time and I love it, and on August 2019 I got it on my iPod, and think when pretty well on it until a month ago. Last month I was playing with my sister and one time when she logged on her user  name changed to Steve. It was really weird and then a few days ago it happened to me to but this time my name went from AloeBeara to Steve and my sister went from Steve to Steve(2). Please fix it. It would mean A LOT. Thank you so much for this amazing game.

 

 

 

                    -Chloe (AloeBeara)