Sorry for the explosive title, but most of the time i play spiral knights, it goes perfectly fine until the dreaded "5 minute lag". Once the heavy lag is over, I'm left racing numbers into my chat bar every time i try to chat. As soon as i press "enter", numbers would start filling up my chat bar. Please fix this.
This looks more like a client sided issue, because you are experiencing packet losses. My only guess is that you've been using dual connections (ethernet and wifi)... Disable either of them (disabling wifi is better).