very bad flickering of realtime ray traced and ray marching directional sun and SSR on shiny metals unity 6000.0.11 bug
turned up denoise radius also and plenty of samples seems like DXR directx 12 bug as unity 2023 did not have this problem with global volume profiles
Can you post some screenshots?
If it’s a bug report it to Unity, talking about it here won’t fix it, reporting will… On Unity Editor, click Help → Report a bug.