Huge amount of FPS DROP even with client closed. Need to exit the app to regain fps

Whenever I open sostronk app PC slows down and huge fps drop in-game. It wasn’t like this till yesterday. And I just cant close the app, if I do I cant join a game. I don’t know what’s up with this suddenly. Just can’t play games with such huge fps drop. And when I exit the app PC is smooth and fast again.
Help please.

@KarMa7 we are still investigating it, will be fixed soon. For now, you can stop your Anticheat (go to Settings in the app) and it should be fine.