I setup and tested/verified a custom domain on my production tenant, but it is not working for my universal login (I still see mydomain.us.auth0.com) or my social connections. The social connections work fine if I use mydomain.us.auth0.com for the callback but not at all if I use the custom domain (login.mydomain.com).
This works fine on my dev tenant for login.dev.mydomain.com.
I have read ALL the Auth0 documentation on the topic, so please do not refer me to the docs. I would appreciate any help or advice on how to resolve this issue.