1.21.10 incompatiblility with Essential

Found in
Fabric 1.18.1
FirstPersonModel 2.6.0
Minecraft 1.21.10
Fabric API 0.138.3

My hat is visible. Oh no.

<img width="1581" height="892" alt="My hat in Minecraft is visible when looking down." src="https://github.com/user-attachments/assets/2adde9f7-70b2-40c9-80fe-ca1bbcffe7cd" />