I am trying to upload a model/animations into Sketchfab but am experiencing some inconsistency. I believe there is some sort of issue with Model Builder-Sketchfab interaction when we are merging the animations into a single .fbx in Model Builder.
The animations play fine Model Builder and then only work sometimes in Sketchfab.
Can you help me understand why this upload works: https://sketchfab.com/models/4eba6c7b34ac416685e25c9d1db12e7a
And this one doesn't: https://sketchfab.com/models/2b71ba0b9e3141eca8c45a691a7b00a5