Kicked from realm then reloads from last save

Me (who was playing on windows 10)  and a friend (who was playing on Xbox) were on a free trial realm when all of a sudden we were both kicked from the realm and it had reset to the last save point, I am the owner of the realm and I didn't do anything that should have caused it. It wasn't showing an error message or anything it just sent me back to the main screen.