In the scenario service desk to the dev team, when the dev team comment on the issue, all comments are synchronized in service desk as visible by the customer, thus exposing every internal discussion to the customer.

I would expect the sync to move all comments as internal in the service desk. I set up basic sync, bidirectional, no filters.

In the wizard, I can filter internal or external comments but for the dev team project on Jira core, the external comments do not make sense.

Is there any trick to make these comments revert to internal ones?