I came across this while investigating this issue MehVahdJukaar/Supplementaries#91
I didn't delve into the mod code since I figured it would be faster to ask here if this is a sodium issue or if there's some way I can make my mod use sodium block color optimization without having those artefacts there

FYI I ran into the same issue with my mod which uses colored blocks and I got things to work properly by disabling the set of mixins in my last comment on #193

I believe this issue is caused by something related to the chunk_rendering feature set but it seems like that feature alone can't be disabled without causing a crash on joining the world.