When doesn't "Custom HTML & CSS" get injected?
I think I have determined that anything placed in the "Custom HTML & CSS > Custom Header" does not get injected when a user clicks on their registration email link code. I believe this because my Piwik analytics never detects activity to the
Are there other pages or events in which the custom CSS or header are not included?
Hm, are you sure? We don't have any particularly special handling for that route, so it should load the same custom js as other pages...