How do I fix light and shadow flickering in Lost But Found with ADATA ValueRAM 4GB DDR4 2400?

Flickering broke immersion in shadow areas. I tried updating drivers, but it didn't help. I cleared the 3.2GB shader cache in GamePP and increased process priority. GPU temperature stayed at 60-65℃. Fan speed held at 1400-1600 RPM. 3DMark confirmed stable rendering. The visuals are now smooth and flicker-free.