On the Portal login/signup page, when the user enters the email and press tab to enter the password, the user’s profile picture automatically appears at the top of the user’s credentials.
Resolution
At first, it appears to be a caching issue, but what is happening is the browser is fetching the data from auth0 being the identity provider in this case.
When checking the Chrome developer tools, this can be seen in the network logs:
Auth0 reference links: