What is the issue?
The Axiom mod doesn't play the animation when joining the world, and First Person Model crashes the game when joining the world when animation setting is on

Conditions to reproduce
all you need is sodium, chunks fade in ( with animation on ) and first person model or axiom mod

Does this issue appear only with Sodium, Iris and Chunks Fade In?
*No, iris doesn't change anything *

Full Minecraft logs
*First Person Model:

java.lang.NullPointerException: Cannot invoke "com.koteinik.chunksfadein.extensions.RenderSectionExt.getAnimationOffset()" because the return value of "me.jellysquid.mods.sodium.client.render.chunk.RenderSectionManager.getRenderSection(int, int, int)" is null

Axiom didn't crash at all*

Is it fixed with the new version? FPM works, but I can't launch Axiom myself

By the way, what do you mean by The Axiom mod doesn't play the animation when joining the world? What animation it should play?

for FPM it is fixed but it still doesn't work with axiom

Oh, I got Axiom to work and tested it myself now. Chunks Fade In does not fade-in and animate chunks, that's what you meant. I'll fix this soon.

yeah, good luck with fixing it

Fixed in f54dc18. Also note that you need the latest version of Sodium and Axiom.