Vulkan : God Of War Chains Of Olympus flicker lighting on texture · Issue #10132 · hrydgard/ppsspp · GitHub

You can see this , using NVIDIA GPU driver

Android] [Vulkan] Constant FPS drop in Final Fantasy Type-0 · Issue #13464 · hrydgard/ppsspp · GitHub

God Of War: Chains Of Olympus HD Texture Pack

Vulkan) GoW Ghost of Sparta graphics regression (now; corrupted tex4xBRZ) · Issue #16170 · hrydgard/ppsspp · GitHub

God of War : Ghost of Sparta crashing/flickering with Vulkan · Issue #10010 · hrydgard/ppsspp · GitHub

GOW Chains of Olympus black squares · Issue #11123 · hrydgard/ppsspp · GitHub

Ghost of Sparta crashing with jit/ir in some situations (HW tess?) · Issue #10897 · hrydgard/ppsspp · GitHub

God of War Chains of Olympus HD Textures V2 on PSP Emulator PPSSPP

Tactics Ogre Let Us Cling Together (ULUS10565): Screen flickering during character transitions in battle and during world map to battle zone transition since v0.9.6-35-g057cad2 · Issue #4833 · hrydgard/ppsspp · GitHub

Game slowdowns when running Vulkan API on God of War 1 & 2 HD Collection [BCUS98229] · Issue #5773 · RPCS3/rpcs3 · GitHub

List of games with graphics rendering issues using mali gpu with vulkan backend · Issue #15016 · hrydgard/ppsspp · GitHub

God of War: Chains of Olympus, PPSSPP Emulator Wiki