Why does my Jonsbo CR-1400E system experience screen flickering in complex GTA V lighting scenes?

GTA V's complex lighting caused screen flickering on my CR-1400E setup, with frame times varying between 10-18ms. Rolling back drivers stopped the flicker but tanked my frame rate. I used GamePP Shader Compilation Queue Manager to clear and recompile shaders, setting pre-compilation to automatic. GamePP Hardware Sensor Page confirmed GPU temps stabilized at 65-70C, with frame times at 8-10ms.