Import BUG: Existing subscriber’s status is reset

This has been a bug for quite a while – when you import a list into an already existing list, if an email address already exists in MailPoet, their subscriber status is reset during import even if the status column is not defined.

This is a breaking bug because it means if you are trying to sync your list to an external list that changes independent of MailPoet and therefore requires periodic re-imports, previously unsubscribed users will once again get re-subscribed.

This has been a problem for over a year and I thought that since this is likely a very easy fix, you could either implement it in core or let me know how to quickly implement a fix manually.

Thanks.