Harsh lighting when light is near wall corners

[syshotdev]

What happened?

Lights near the walls give off a very blocky harsh lighting.
Colored lighting is the issue, as when I turn it off it fixes the problem.

Steps to reproduce:

1. Turn on my settings
2. Create a room out of white concrete blocks underground (To stop sunlight from bleeding into the scene)
3. Place sea lantern (or any block light) in wall as shown in the picture

Minecraft Version

1.20.1

Which shader mod are you using?

Iris

Shader mod version

The version last committed on Nov. 9 (I can't find the version number)

Shader settings

#Sun Dec 10 13:22:45 PST 2023
shadowDistance=64.0
BLOCKLIGHT_I=1.01
COLORED_LIGHTS=true
WAVING_LEAVES=false
RAIN_PUDDLES=false
SKYLIGHT_I=0.00
OVERCAST_SKY_AFFECTS_LIGHTING=false
ENTITY_SHADOWS=false
SSS_SHEEN=false
INFO=0
WATER_REFRACTION=false
HARDCODED_SSS=false
CAVE_LIGHTING_I=0.99
BLOCKY_CLOUDS=true
WATER_TEXTURE=WATER_TEXTURE_VANILLA
SKY_REFLECTIONS=false
SHADOW_VPS=false
SSS_INTENSITY=0.99
AO_IN_SUNLIGHT=false
SSR_INTERSECTION_STEPS_ROUGH=4
VANILLA_SUN=true
VANILLA_AO=false
AURORA_FREQUENCY=2.00
SKY_GROUND=true
VOXEL_VOLUME_SIZE=64
SSR_REFINEMENT_STEPS=3
WAVING_PLANTS=false
BLOOM_INTENSITY=0.42
SSR_ROUGHNESS_SUPPORT=false
WATER_PARALLAX=false
SSR_ROUGHNESS_THRESHOLD=4.0
AIR_FOG_COLORED_LIGHT_SHAFTS=true
WATER_FOAM=true
SHADING_STRENGTH=2.00
shadowMapResolution=1024
AURORA_GROUND_LIGHTING=0.20
PIXELATED_SHADOWS_RESOLUTION=256
GTAO=false
WATER_WAVES=false
SHADOW_PENUMBRA_SCALE=0.5
NETHER_FOG_INTENSITY=0.51
CLOUDS_TEMPORAL_UPSCALING=1
SSR_INTERSECTION_STEPS_SMOOTH=8

Relevant log output

No response