Rendering the SkyAtmopshere component using Vulkan with and without Vulkan (SM5) enabled causes artifacts to appear on screen on Windows and Linux.
This was reported and tested in 4.25.1 (CL-13594126) and reproduced in 4.24.3 (CL-11590370).
Results: Flickering artifacts when using the Vulkan RHI
Expected: There are no artifacts as D3D11 does not exhibit this issue
There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-95473 in the post.