I've created a newsletter block on my website and chosen Mailchimp as my storage option and chosen double opt-in. I've disconnected Squarespace for email campaigns. I may be missing a step because as I'm testing this feature, I receive a generic email (non branded like I set up in Mailchimp) asking me to confirm my opt-in to the newsletter. Once I confirm opt-in, I receive a thanks confirmation but nothing is populating in Mailchimp on the back-end (no contact, first name, last name, or email address). Would love help here or to know if others are experiencing this same thing.