We changed the default avatar image files but the old ones are still displaying, even for brand new members. I notice they are loading from i0.wp.com/mydomain.com/wp-content/plugins/avatars/avatars-files/images/... Is there any way to clear this Gravatar cache? If that is what's going on, I can't find any Avatars settings in the network dashboard.
FYI: We just discovered that Hummingbird's “Gravatar Caching” was on. After clearing the Gravatar Cache, Avatars are still loading from i0.wp…so I deactivated and reactivated Gravatar Caching, the issue still persists.
Also, we do not use jetpack so I have no idea where the i0.wp URL is coming from.