Isolated Users Get Unsubscribed or Subscribed After User Feed Import

@TomBe I understand this feels like a major issue, however this might be entirely to do with the way you have your system set up, so I am downgrading the priority to Normal until we know more.

Can you please provide some additional details about:
- How you have mailchimp configured, (details like which submodules are you using and what how do you have them configured).
- What your Drupal Feeds is doing (saving user objects, setting specific values, etc..)?

Then we can try to provide some support into how to fix this issue.

Thanks!