I'm seeing this issue on a production server (unityconn 10.5 cluster). Since last week not receiving any deleted_message or deleted_message_Create notifications when a message is deleted. But deleted_message_read notifications are received after a while. Some of the mailboxes are empty since the user reads/deletes the message immediately.
Also, new_message & saved_message notifications are received every 5-6mts repeatedly for the same message.
Will restarting notifier fix the missing notification issue? What's causing it to ignore delete notifications. resubscribing did not seem to resolve the issue. The unityconn server is handled by a diff team...we haven't requested for a notifier restart yet.
Are you still experiencing this issue? Were any configuration changes done in the days/weeks preceding this behavior?
It seems to have resolved overtime. There were no changes to the system except that the users mailbox was empty.