Some light sources stop rendering when chunk is out of view

[biggussalad]

What happened?

Using photon with ATM10 on 1.21.1 which thus far has worked flawlessly. Version mismatch may be the culprit here but nevertheless, whenever a chunk with light sources in it is out of view and I am physically looking away and in another chunk, the out of view chunks and its light sources seemingly unrender. When I turn back around they load in which causes a very annoying fade in to happen.

Another odd thing to note is that the as the lighting fades in there is a red glow. This makes sense because directly beyond the walls in the video is flowing lava. So for some reason the block lights are disappearing but the lava light stays.

I dont know if there is a particular setting involved but I have spent hours and cannot find anything that makes a difference.

issue.example.mp4

Minecraft Version

1.20.2

Which shader mod are you using?

Iris

Shader mod version

1.0a

Shader settings

#Sun Jan 12 17:48:15 EST 2025
AIR_FOG_COLORED_LIGHT_SHAFTS=true
BLOCK_ENTITY_SHADOWS=true
COLORED_LIGHTS=true
HANDHELD_LIGHTING=true
INFO=3
SH_SKYLIGHT=true
TAAU_RENDER_SCALE=1.00
VIGNETTE=false
WATER_CAUSTICS=true
shadowMapResolution=4096
tonemap=tonemap_hejl_2015

Relevant log output

No response