Shrimple shaders only applying RTX light within chunk

I have encountered an issue with the Shrimple shader where it only lights up areas within the same chunk and not the area around it. I am currently also using other mods such as distent horizons and some optimization mods. I don't know if this is an issue with Iris or a different mod, but if anyone knows what this issue is, please let me know. Edit: It turns out this is all within one chunk, but it just refuses to correcty light the other parts of the chunk.