Qusing the commands on cell phones with 1gb ram results in errors, this is what happens the first time you put commands in a new world, it takes time to execute the command, so if you are in creativity and change it to survival and in the response time it takes to execute the command, you fly, you will have a fly bug (it has been like that from 1.17.10 to the last beta) I don't know if I explained myself well