onTicketUpdate works only for ticket properties, but not works for custom fields in serverless app

What is event trigger for updating custom fields. We learned that onTicketUpdate works only for inherent ticket properties, not for custom fields. Please suggest solution.

Hi Karuppu Samy,
Good Day!

Changes to custom fields will not trigger the event. However, when a ticket property is changed along with a custom field, the event is triggered and it will have the custom field changes information.
and We can take it as a feature request.

Let me know if you have any other question.