Issue Summary

The endpoint /rest/api/3/issue/ won’t return the issue sub-tasks if the issue is part of a team-managed project.

Steps to Reproduce

1. In your Jira Cloud instance, create a new ticket with the Task issue type (Make sure to do this in a team-managed where sub-tasks are enabled).
   -  Take note of this issue key
2. Access the issue and create a sub-task in it.
   -  This can be done by clicking on  Add → Child issue.
3. Do an API call by passing the main Task as a parameter
   -  The call should be something like GET [ instance ]/rest/api/3/issue/[ issue_key ]

Expected Results

The request should return the sub-tasks in the "sub-tasks" field.

Actual Results

The field "sub-tasks" is not present in the request return content.

Notes

When calling one of the sub-tasks using the Get issue endpoint, it will the field "sub-task" will return as True. Reinforcing the incoherent behavior.

Workaround

Currently there is no known workaround for this behavior. A workaround will be added here when available