Why does the screen flicker when light and shadow interact in Ghost of Yotei?

The flickering broke my immersion every time light hit my character. I tried updating drivers, but it persisted. I used GamePP Shader Compilation Queue Management to clear the 3.2GB cache and recompile. GPU temp stayed at 60-65℃ and fans at 1400-1600 RPM per GamePP. 3DMark confirmed stability. I switched profiles.