Guild Wars 2

For some reason every time I open the trading post my game minimizes. I use the F key to interact with all npcs and so far the trading post is the only thing doing this. Clicking on the Black Lion icon on the top left of the screen does the same thing. I never had this problem before it started quite recently. I haven’t installed any programs recently so that cant be it either. Has anyone else had this problem yet? Only other program that interact with guild wars is Nvidia Shadowplay.
edit
I also use two monitors and run guild wars full screen (not full screen window) on one screen so I cant accidentally click one something in the other screen without alt tabbing.