Map scrolling performance drop

[Joriom]

So, I've notived that when you hold LMB and move your cursor around the map area FPS drops considerably BUT if your cursor gets out of the main bot and you start hovering over players list or outside the game at all (still holding LMB) map will scroll smoothly. Also there seems to be some leaks, cause in games taking few hours those "lags" tend to increase.