Yes, its obviously something with your system, might be macros.
Strange how it only happens around certain people. No lag with a 30 v 30, but get around these guys and it lags like crazy. I've been around long enough to know lag switches are a thing, and I cannot believe people still deny this. It has been around since the dawn of online gaming. There was a certain stamdk I duelled the other day and it always conveniently lagged the second the fight started.