How to copy Labels' field value from main issue to all related issues and sub-tasks

Question

I need to set up an automation to copy the Labels' field value from the main issue to all it's related/linked issues, and sub-tasks. This needs to be done for all newly created issues and already created issues whose parent or related/linked issue has this specific label associated to it. However, not all main issuetypes will be Tasks. I have already tried multiple ways but none of them seem to be working even though the JQL condition I'm using is being validated.

Dillon Scicluna · Answer

With regards to the snippet, that's what I was doing. Also, I do not want to run Schedules as I need the issues to update the 'Labels' field instantly.

Sayed Bares [ServiceRocket] · Answer

@Dillon Scicluna You can do this with the following automation role:

As for the trigger, if you want to do it for already existing issues then use a  Scheduled tigger to copy labels for all existing issues and  use Issue Created trigger for all newly created issues.