Precels are very buggy with iris shader

Minecraft fabric 1.20.1
tacz-fabric-1.20.1-1.0.2-hotfix2-release.jar
iris-1.7.2+mc1.20.1.jar
indium-1.0.34+mc1.20.1.jar
sodium-fabric-0.5.11+mc1.20.1 (1).jar

i've also run into this problem but it seems to only affect sights you attach to weapons; default reflex/red dot type sights as far as i recall are mostly unaffected (they might not render properly but you can at least see through them, can't remember at the moment)
also the issue goes away and sights render properly when using a shader pack (tested with bliss, photon, and solas iirc)