Avatars Upload and Display on 'Main Site' Only

I have Avatars installed, when a new user creates an account, their avatar is uploaded to the sign-up 'main' website correctly, and displays correctly inside the main website 'users' section.

When the new user goes to their newly created 'sub-site', their avatar doesn't show up, nor does changing the avatar in their 'Your Profile' section change the avatar for them -- however, it DOES change it for the 'main site'.

I'm not sure why. I've granted access if anyone can figure this out for me.