Version: VRCSDK3-AVATAR-2020.09.25.00.08_Public

If your model has an avatar descriptor on it and you switch from "Generic" to "Humanoid", the avatar descriptor overwrites the "Action" playable layer with a duplicate of the "FX" playable layer. This fixes itself if you reset the layers to default.

Steps to reproduce:

Bring a model into Unity, ensure it's set as "Generic"

Add an avatar descriptor

Turn on custom playable layers on the descriptor

Switch the model to "Humanoid"

Look at the playable layers