Ah, this is very normal, especially when your in fluorte due to the number of users. You will encounter this almost everytime you play on FH. All you can do is keep playing, pnce it closes, open it up again and keep playing. You may be able to reduce the amount of lag by lowering the water reflection and view distance. (in options>video). You can also go into a less corwded place like cape, because fluorite is packed and causes serious lags. otherwise, there is nothing you can do, im very sorry.