New CRM to Campaigns Sync Doesn't Continue Making Updates

New CRM to Campaigns Sync Doesn't Continue Making Updates

Changes made in CRM are not appearing in mapped fields in matching Campaign records after migrating to the new sync process. The only way we've found to get records to update is to call into Support and point out the problem. After convincing Support there's an issue, they trigger the sync from the backend and assure us the sync will work continuously going forward - it doesn't. We've done this multiple times now.

While I believe it's a good idea to have all Contacts sync and specify sub group mailing lists via Segments etc, unfortunately as of right now this CRM-Campaigns sync implementation isn't reliable. 

Could someone please look into or explain why this is happening? We'd rather get this working than have to look for alternatives.