Hi,
I'm using Magento 2.2.5 and I've added the custom fields in the Customer Registration page and when a new Customer register and Check 'Subscribe to Newsletter' option then the Customer Name, Email, Custom fields data is synced successfully with the MailChimp account and I can see them in MailChimp account.
Issue
When I use the AWS CDN for the Static Files and Change the Static File URL from the back-end then on New Customer Registration only email Id is Synced to the MailChimp Account the Customer First-name, Last-name and Custom field options do not sync.
Can someone help me in resolving this Issue?