Unity + Mixamo animation -> CC4 avatar Mouth

Pipeline Unity
1

image
image827×532 78.6 KB

I exported one of avatar from CC4 with Motion(idle animation) + Mesh for Unity(2021.3), and built materials via CC4 Importer(1.6.3).
When I used the animation exported with the avatar, the avatar looks fine. However avatar mouth gets open when I used Mixamo animations as the image. Other animation package I purchased in Unity asset store has the same issue on the mouth of CC4 avatar.

  1. Is this a known issue?
  2. How to fix it?