Difficulty changing channels

Its not that it takes a while to change chs, just that when selecting a ch it does nothing, as if the ch change request was never done (can still move and attack just fine) , by the 2nd or 3rd time it seems to work though (on rare occasions it would work in the 1st attempt). I reinstalled MS in hopes this would fix the problem, but seemed to have no effect. Also tried both web based and non web based launching as well as wireless connections and wired. All configurations produced the same result. I suspected that this problem is server sided, but this seems to support my suspicions. This problem was not a slow development rather it seemed to have appeared after the last SC we had, I do hope that the next SC will fix this, because it is rather annoying.