Since adding this mod on Minecraft 1.20.1 with Fabric, my beacon beams do not render anymore.
If I turn on complementary shaders using the Iris mod, the beacons work again.

I am using various other mods such as Sodium which may cause issues. Has anybody else experienced this?

After doing some more digging into this, it only occurs when using the Iris shaders mod, and having any shader packs turned off.