• tested with v1.4.7-mc1.18.2-fabric and v1.4.8-mc1.18.2-fabric
• Mods which might cause a compat error:
  sodium-fabric-mc1.18.2-0.4.1+build.15
  iris-mc1.18.2-1.2.5.jar
  indium-1.0.6+mc1.18.2
  lithium-fabric-mc1.18.2-0.7.10
  phosphor-fabric-mc1.18.x-0.8.1

not sure if its a compat issue, but my console is spamming this OpenGL error.
and sometimes e.g. if I change the dimension from the nether back to the overworld (without using the Portal) I get a black screen.
If I resize the window, the world renders normally again.

Is this your entire modlist?
I'm experiencing the same issue but have disable each of your listed mods and still experience it. In fact I installed just these mods and everything worked flawlessly, no OpenGL spam or black screen.

The easiest way to recreate it for me is to set a spawn (overworld), go through a nether portal, type /kill

Could you provide a complete mod list so I can cross check and begin isolation the cause?

Thank you for your efforts to find out.

After an hour of brute force testing, I've found that the problem is actually Spectrum.
I have tested with all other 217 mods enable. Everything works fine.
Tested with just Spectrum (and it's dependencies) - Issue occurs
Spectrum is the cause

Also I have spoken with the Spectrum dev and made them aware of the issue. They are working to make it compatible with their next update.

There is already an issue about spectrum #1109