Hitching on Steam Deck with almost everygame.

Hello, I have Steamdeck OLED 1TB, and as I said I have problem with FPS in everygame I play. It's fps hitches or 1% low (I am not sure) but they appear in everygame I play, and it doesn't matter if it's games like Drova, Dark Souls 2 or Signalis or some new ones (Like Ready Or Not), and graphic settings doesn't really matter. They like every few mins (even less). It's annoying as hell. Is my Steamdeck somehow screw, or is it OS fault? I literally reinstalled my Steamdeck three times, it didn't helped at all. I tried disable FPS limit or V-sync, literally nothing helped...