We are experimenting a strange problem on a clustered instance (active clustering).
We have setup email notifications in order to receive an email when a workflow completes.
After activating the cluster we are receiving multiple emails stating that the workflow has been completed.
From the logs it is clear that workflows are cluster aware, so workflow logic is done only on master instance (no workflow logs on slave instance).
My impression in that synchronization messages from master to slave are triggering email notifications also from slave (looking at message header it is clear that the extra messages are coming from the slave... stopping the slave extra messages stop).
Do you have any idea if this is a bug or it may be related to some misconfiguration?