Mod models have a weird interaction with the changed mod (and the subsequent "changed addon" which will not be discussed here) and when mid-animation, you are unable to see anything but the face of the transfur you have become. the animations work just fine, but the models act strange when interacting with them.

Is this issue from 0.13.1, or is it from the dev build on github?

it's an issue from 0.13.1. I downloaded the mod and am using it in a private modpack with friends and we have been going out of our way to add multiple mods that infected players can use since better combat does the weird rendering issue.

Duplicate of #869. Already fixed/added for 0.14.