Hey @sandeld,
Hope you’re well.
Can you be more specific about how can I replicate the problem? I didn’t understand what are you referring while saying “hidden groups”. When I test the Mailchimp integration with hidden lists it works normally.
If you can open a thread on the support forum, I want to solve the problem with you. I want to replicate it and report it if it’s a bug. But maybe there can be a plugin/theme conflict. Did you try only with Hustle and default Twenty Seventeen theme?
Cheers,
Oguz