I have received this bug report:
TelepathicGrunt/Bumblezone-Quilt#66

The issue the user reports is that when they add Bumblezone’s bee chest plate and then any other armor on while in 3rd person view, they get a crash with 3 mixins that show up in the stacktrace. I do not know exactly what is the cause or why the crash occurs.

Could you please take a look and let me know if there’s anything on my end that is the cause or if this is something that cosmetic armor needs to fix? Thank you

How I register my armor models/textures:
https://github.com/TelepathicGrunt/Bumblezone-Fabric/blob/7ca6d8cce2b0802a6555a4c09e2f09ad0545c215/src/main/java/com/telepathicgrunt/the_bumblezone/items/BeeArmor.java#L37

https://github.com/TelepathicGrunt/Bumblezone-Fabric/blob/7ca6d8cce2b0802a6555a4c09e2f09ad0545c215/src/main/java/com/telepathicgrunt/the_bumblezone/client/BumblezoneClient.java#L88

https://github.com/TelepathicGrunt/Bumblezone-Fabric/blob/latest-released/src/main/java/com/telepathicgrunt/the_bumblezone/client/rendering/BeeArmorModel.java

Can't reproduce this issue with Cosmetic Armor 1.3.0 and Bumblezone 5.0.10+1.18.2 on Minecraft 1.18.2.
Also, the most recent mixin in their crash log seems to be handler$bnn000$getArmorTexture, while Cosmetic Armor neither calls getArmorTexture nor mixes into it.
This must be some other mod chiming in.

The problem is adding GeckoLib into the mix, similar to #12.
I'll try to find a compatibility patch ASAP.

Thanks, I'll look into it and let you know.

Fixed with version 1.3.1 of Cosmetic Armor. If the problem persists, let me know and I'll reopen the issue. Sorry for the inconveniences!