Hello! We use the mailchimp sync plugin to keep our customers in the mailing list of Mailchimp for big monthly alerts. We have an issue where many of our users who are newsletter subscribers in our store are being marked as non-subscribers in the mailChimp list. The plugin details only say that the Nop newsletter subscription is the flag that translates to being a subscriber in Mailchimp. After doing some major digging on Mailchimp's side, their technical team stated that the users are being sent to their system as non-subscribers, not that they are somehow globally unsubscribed from Mailchimp as I initially suspected.
Has anyone else had experience with this? Is there some kind of bug in the plugin where some scenario causes users to not be marked as subscribers? We can't find the commonality of the users that are blacklisted. Greatly appreciate it!