Rigged Animation not playing as expected on sketchfab


Ive created a little run animation of my character using a rig i created in maya. The animation plays fine in maya and also in Unity3D when i import there, however when i import to sketchfab, the helmet and cape part of the skeleton dont move :frowning:

These joints i added myself in maya and animated slightly differently from the rest and i fully expect this issue to be down to my shoddy rigging, but i was just wondering if anyone knew what the issue might be?

id rather not publish the model - and hope people are able to see this link? thanks!! https://sketchfab.com/3d-models/testanim-2e9cdc837510472e97959029d3400cc6