Issue on Rubidium repo:
Asek3/Rubidium#133 (comment)

I suspect this to be the fault of Rubidium, but I'm referencing it here as well.

Issue on Rubidium repo: Asek3/Rubidium#133 (comment)

I suspect this to be the fault of Rubidium, but I'm referencing it here as well.

This is an issue with how this mod handled Geckolib Armors, which was changed recently due to an issue where armors on mobs wouldn't be unique and the first rendered entity would control the others. See #6

Ah I see, I'll make sure my comment on the Rubidium repo is marked as a possible red herring. Thanks :)