Chat laggs/disconnects

Heya.

Since yesterday I've been randomly disconnected every 15-30 minutes for no apparent reason. On top of this my chat laggs all the time, to the point that I can't even play the game properly. All chat messages don't show for periods of about 5 minutes, then show up all in a bunch.

I don't really get the problem. I've checked all my connections, restarted my router and looked into if I'm having any connection problems with other programs. Live streams, internet and other games with internet access are showing no problems, so I don't really have a clue as to what my problem is.

Cheers, Athema