Adobe staff - I completely understand your concern, and I appreciate your patience. The issue may indeed be on Mixamo's side; however, since there is no dedicated support team for them at the moment, the best course of action would be to wait it out for now.
Rest assured, I will investigate this issue further and share your feedback with the team. In the meantime, I will keep your case open and provide updates via email as soon as I have more details on the matter.
I truly appreciate your patience, and I’ll make sure to keep you informed every step of the way!