I've been playing this game over a year now, this lagging started maybe a month or two ago, before that everything is so smoothly and quick.

I noticed a few people don't have this issue; Because I have some tech background, there's a possibility that if a DNS is not friendly to a website, people who are using this DNS will have hard time to connect with the site. (e.g. we have to try several times to setup connection, so the lagging happens). I changed DNS once, but the problem stays. So no conclusion. but if this is true, not just FKG, other games at Nutaku would have the same issue too.