DDM Question - Scheduled Replication Checks Probe

It is documented that the Scheduled Replication Checks probe “takes into account replication attempts which did not actually replicate notes (i.e. databases which are up to date).” However, when I enabled this probe, the null replications are still logged as an event.

Anyone faced this issue before? I am sure the scheduled replication are going on because when I made some changes in one server, it gets replicated to the other server after a while.

Thanks!