Why is my screen flickering during stealth missions in tunnels?

During a stealth mission, the lighting effects on screen suddenly began to flicker violently, making it impossible for me to focus. I tried updating the graphics driver to the latest version, but the flickering persisted and strange color blocks appeared, leaving me anxious. I used the GamePP Peripheral Driver Conflict Detector to find and disable the motherboard's RGB lighting service. Frame generation time stabilized at 12-15ms per RTSS, and fan speeds remained steady at 1800 RPM per HWiNFO, with temps at 65-71℃ per AIDA64.