the 380 worlds are bot worlds, when the bot system recognize unfamiliar play on the account as like its a bot, it will DC you and put you into a 380 world, idk for sure if it disconnects or when you log back in you are in that world or what not, just logout and go to the real world you want because that shows you are not a bot.
if you continue to bot in this world then the chances of the account lasting aren't long. just a pre-second chance before getting banned I suppose. 14 year olds whom play wouldn't recognize this. that's why they did it.