What happened?

Shadows are weird with some shaders.

Screenshots

Iris:

Iris & Sodium:

Log output

No response

Minecraft Version

Minecraft 1.16.5

Iris Version

Iris 1.2.7

Operating System

Ubuntu 22.04

What is your GPU?

GTX 1070

Additional context

https://github.com/Lana-chan/maples-retro-extravaganza
+

#Sat Sep 03 21:10:51 CEST 2022
Dither=false
CRT=false
s_palette_id=13
Scanlines=false
pixel_size=0
Preprocess=false
Pixel=false

Appears to be fixed as of 5952101