I placed the extruder on my 1.19.2 world with a custom modpack, and after I have placed the water and lava next to it and gave it the cobblestone recipe, my world crashed with a "Block failed to render" error. I only manged to recover it by deleting the block using server commands.

This is an error file from the world. The issue doesn't occur on a clean world with only the mod, meaning it's some interaction with another mod. The issue occurs when you give the extruder ANY item in the recipe slot.

https://pastebin.com/CFx3jpfZ

Hi!
Thanks for the report.
I'm not able to reproduce the bug.
Some optimization mods like rubidium tend to break render systems, but I'm not shure in your case.

First recommendation... update all the create & addons to the latests versions.
Second... try disabling optimization mods.

Hope you find the issue.

If you have this problem, once you turn off the shadow mod, enter the world and destroy the Extruder where the recipe is set.

This problem is caused by the Extruder with the recipe set not rendering correctly when the shadow mod is turned on.