unable to create subtask when the Postfunction 'The field labels will take the value from Labels. Source issue is the parent, destination the sub-task.' is prioritised before the 'Creates the issue originally.' Post function

• Description*
  unable to create subtask when the Postfunction 'The field labels will take the value from Labels. Source issue is the parent, destination the sub-task.' is prioritised before the 'Creates the issue originally.' Post function

Does not allow to create a subtask.

Error : We can't create this issue for you right now, it could be due to unsupported content you've entered into one or more of the issue fields. If this situation persists, contact your administrator as they'll be able to access more specific information in the log file.

Steps to reproduce the issue

• Update Post function as in the below screenshot, on the Create issue transition.

• Make sure that the post function 'field labels will take the value from Labels. Source issue is the parent, destination the sub-task.' is of higher priority than the 'Creates the issue originally.' Post function
• Create a subtask.

You can see the issue.

• Troubleshooting*
• Observed that the issue is not reproducible when 'field labels will take the value from Labels. Source issue is the parent, destination the sub-task.' is of low priority than the 'Creates the issue originally.' Post function'
• ISsue is not reproducible for other custom fields like copy summary or priority

Workaround

Move the event of the post function after the "Creates the issue originally" and the field will be properly copied.