>>The problem is that in Agent it existed as count only. If before clicking on the message on the Subscription panel, I would click on the Agent icon when it was showing count 1, I would get 0 counts on the next page and no list of messages.
>
>Ok, this would probably mean the refresh stopped for some kind of reason. When this happens, a manual refresh is necessary to start it again.

It happens always. I never were able to see any message from Agent icon (when count > 0).