Shader complexity reported (on AH) broken on Linux since 4.25. No local repro attempted.
Perhaps turn on debug view modes ("viewmode shadercomplexity", bound to F5 by default) in a Linux editor.
Also occurs in Windows editor when launching with "-vulkan" command line.
(shaders that aren't rebuilt might still show up as checkerboard... if this occurs, you can delete your shader cache and try again)
There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-111807 in the post.