We have campaigns running in SFDC but not all the opportunities are pulling in. The Primary Role is checked off, yet the Primary Campaign Source is empty. Marketo cannot write into opportunities to change the value, so we have to rely on SFDC to pull it through. We are told that if the primary role is not tagged from the start and tagged later it will not come through and there is nothing we can do.
There are some threads on this. The issue is on the SFDC side.