Why do frame times spike to 45ms during intense combat in Helldivers 2?

During intense squad combat, frame times suddenly jumped to 45ms, causing fatal stutters at the worst moments. I disabled the camera device in Device Manager, which fixed the FPS but killed my streaming. Using GamePP Peripheral Driver Conflict Detector, I set Razer Synapse to manual start and enabled hardware encoding priority in OBS. RivaTuner showed frame times stabilizing in the 7-12ms range, and OBS confirmed the elimination of frame rate fluctuations.