Internal notes not emailed to Light Agent requesters

If a light agent opens a ticket, then their request appears as a private note. In this case, the editor in Zendesk defaults to a private note. However, a response entered as a private note does not go by email to the light agent, yet the light agent when logging into the web interface can of course view the notes.

Only a public response goes by email to the requester if they are a light agent.

Before we switched to "Enhanced Cc", a Light Agent requester would receive any private notes on the ticket by email so this was never an issue. However now we have switched, this has stopped happening. This seems like a bug - can we get the expected behaviour back, please?