Could you provide your fbx file in private post?
It might be the current design that a bone can only assign to one category (Facial Bone or Jaw Bone), if it is as I described, I will pass this info & your file to the dev. team to discuss this design.
Feedback Tracker Admin
Can you provide your FBX and character file to us?If the file size is larger than 10MB, you can use cloud services such as Google Drive, Dropbox or OneDrive to make the files available to us and put the link in your comment. You can use Private Comment if you want to keep it private.
Already tried the full setup process before I contacted support.
Thank you but THIS IS NOT a solution, bump!