Heya

Usually this happens because of a bad connection - you're basically getting dropped because your connection to the server isn't stable, and this most commonly happens if one is using a wireless adapter.
Sometimes the server itself just dies and spasms in all sorts of interesting ways, and then you take into consideration that our server is in Singapore and we're a lot further away, so bumps can happen in between networks.
If you're using a firewall or router, do make sure that you have UDP port 7777 enabled for the server Laanx - it may help.