I use BSL shaders and it usually works perfectly normally, but with this mod, glow-squid/squid silhouettes appear in the sky in the distance, locked to the camera's rotation until you look far enough in a direction that they disappear.

They flicker occasionally, un-animated and consistently appear (Persisting for at least 50% of total game time), only changing in amounts or location in the sky.
This only happens in the overworld as well.

It seems to be a similar bug to one that Alex Caves has, where whilst you are above a Primordial Cave biome, the lighting effect from Ambersol also appears in the sky randomly in the exact same way.

Hoping this is fixable!