Why is my button response delayed during intense tunnel gunfights?

In Metro Awakening subway tunnels, my inputs felt dead. AIDA64 showed 12V ripple between 0.15V-0.22V. I changed power connectors, but nothing worked. I used GamePP Peripheral Driver Conflict Detection Tool to disable a background service. GamePP Stress Test verified voltage at 11.95V-12.05V. The latency is gone, and I can export this profile.