I was on my Nintendo Switch, and I was playing Minecraft one day. Everything was normal, till two days after (today, May 10, 2020), and all of a sudden my sister could FLY IN SURVIVAL!!!! I could still kill her and so could hostile mobs, so I when to the setting and tried to turn her into creative then back into survival. Nothing happened. Then I turned off her ability to build, place, sleep, etc. but it didn't do anything!!! it's really upsetting. I don't know what it is, I think its a bug, but please fix it.