Issues with tongue texture being skin colored in Unity Blendshape

[PcWingman]

Hello, I am going through the process of using the Unity Blendshapes imported from the Blender Shapekeys and noticed the tongue is skin colored for some reason. This happens on multiple cards and regardless of whether I squash the materials on the body object or not before exporting the FBX.

In blender the texture looks fine on the body object using a shapekey:
Without atlas:

With atlas (quality goes down quite a bit):

This is what it looks in Unity as a blendshape:

The texture looks more similar to the one without the atlas, but it comes out skin colored for some reason?

Looking at the body atlas file the tongue I believe is in this region and looks correct...?

Is there something I am missing related to this texture? I have even tried keeping the tongue material around on the body object and exporting the FBX then using the KK Tongue atlas on it, with no changes...