Black Bar in Sky

When using the snapshot stated above I enabled the super secret settings(Shaders) and when using the shader "minecraft:shaders/post/fxaaa.json" I noticed a black bar appearing in the sky. I am not sure what is causing it besides the shader. My computer is all up to date. I will upload screenshots to show my screen.
UPDATE: It seems not isolated to that one shader. It happens on several others but to list them out would be pretty difficult to do.