This is probably just caused by the AMD Windows driver not supporting VK_EXT_graphics_pipeline_libraries.

It seems to have gotten better once I let the shaders cache per area but could that really be the cause?

Yes. The extension mentioned above is specifically used to help such issues. Though Unreal Engine games are in general just not great in that regard.

Yes, that is most likely the case. You can stand around in on spot as long as you want, it will still stutter on every new effect/material/object/whatever. Without VK_EXT_graphics_pipeline_libraries, DXVK can't precompile any shaders. That said, amdvlk enabled VK_EXT_graphics_pipeline_libraries for DXVK with the last update, so it's only a matter of time until it hits windows.

Yes, that is most likely the case. You can stand around in on spot as long as you want, it will still stutter on every new effect/material/object/whatever. Without VK_EXT_graphics_pipeline_libraries, DXVK can't precompile any shaders. That said, amdvlk enabled VK_EXT_graphics_pipeline_libraries for DXVK with the last update, so it's only a matter of time until it hits windows.

so these files exist but there's
no way to implement them right now?

It's a driver thing. The Windows AMD driver doesn't expose the extension for dxvk at the moment. Likely next release

It's not files, it's a vulkan extension and they are implemented in the linux vulkan driver. You will have to wait for AMD to update the windows driver.

It's not files, it's a vulkan extension and they are implemented in the linux vulkan driver. You will have to wait for AMD to update the windows driver.

Ah I see, unfortunate but your saying since this recent update happened with dxvk that amd is soon to update?

AMD updated their linux vulkan driver with universal VK_EXT_graphics_pipeline_libraries support recently (before they explicitly disabled it for DXVK because it was apparently broken). The linux and windows drivers share the same base, so it is likely that this update will hit the windows driver soon.