How to fix visual flickering in light and shadow areas in Overwatch 2 on Onda H610M hardware?

Flickering in Overwatch 2 broke immersion whenever light hit characters. Updating drivers didn't work. I used the GamePP Shader Compilation Queue Manager to clear the 3.2GB cache and recompile shaders. I also boosted game priority. After a slow startup, GPU-Z showed temperatures stable at 60-65℃, and GamePP confirmed fan speeds at 1400-1600 RPM. The visuals are now perfect.