Reverse replication of form data

Hi

We are in the setup phase of our new CQ5.4 environment. The replication system basically works both ways, blog comments entered on publish appear back in the author instance as expected.

But the stored data of form input fails to replicate back to the author system. I think the problem is caused on the publish, because no entries appear in the log of agent "Reverse Replication (outbox)". Is there any additional configuration required for form data to replicate?