Just started this weekend, my WOW main window started to lag. When I click on a new NPC, there is a brief pause before it is shown as target. When I start spamming my dps key in pvp, keyboard button 1, which ISBOXer translates to 1,2,3,Y. When I start to spam it, the main WOW window will start to lag horribly. If I stop spamming, it goes back to normal. I try to debug this but it is not due to add-on, graphical settings, or network. Have you guys experienced anything like this before ?