Issue with Add/Update Subscriber feed

Hi there

We have a Gravity Form on the above page which adds people to Drip. We’ve added both the Add/Update Subscriber and the Subscribe to a Campaign feeds to this form, however, the Add/Update feed doesn’t seem to be working properly. It adds new people but doesn’t seem to update existing people.

We’ve tested this by unsubscribing from an email, which changes our Drip status to unsubscribed, as expected. Then we’ve tried re-submitting the signup form to resubscribe, but this doesn’t change our Drip status from unsubscribed to subscribed. We also don’t receive the campaign again that should be triggered on form submission.

We reached out to Drip who have looked into the issue but say they can’t help us. Can you please shed any light on this matter and fix the issue?

Thanks.

The page I need help with: [log in to see the link]