Can I update Salesforce bounce fields when a member is cleaned in Mailchimp?

Since a Salesforce contact can have more than one email address and be subscribed to more than one list, we don't map any of those Member statuses to a single field on the related contact or lead record. 

Instead, the status is updated on Mailchimp Member records when the primary sync runs (or you click the refresh icon on the member component). 

You can add custom automation to update the related contact, but please make sure it is run asynchronously to avoid conflicting with our code. 

More on Audiences and Members