Scenario:
1. Reporter submits a ticket in the service desk.
2. The agent takes ownership of the ticket and adds a comment with additional questions. Reporter receives the notification and responds.
3. Public comment is added to ticket but the Agent never receives a notification.
The Agents currently only get a notifications when the Public Comment changes the status of the ticket which does not include the public comment or when they are mentioned in internal comments which is not an option for reporter in the service desk.
Note that I made sure that the Agent is not part of an organization.