For some reason when I enter the Nether, the shaderpack stops working. The shader effects turn off but it says the Shrimple shaders are on in the menu (I'm using Iris)

Iris error code: net.minecraft.class_2973: Invalid shaders/core/entities_alpha.json: The call method_34416 is not cancellable.

Overworld view

Nether view

What is shader without shade? R.

Error in chat

Please let me know if I have done something wrong or if I should submit the issue to Iris' GitHub.

try latest in-dev version, probably fixed already.
https://github.com/Null-MC/Shrimple/archive/refs/heads/main.zip