Data lost

Hello, my Xbox name is Rigiids, I joined my world with my sister 2 weeks ago, my data was there and when I joined this day (February 14 2019) my data was lost, yes I am using the same Xbox account, same device I always sign in (iPad Pro 2018 11'6) and I got very mad, my sisters data was still there, mine wasn't and I decided to make a report here