Requirement: To copy existing value of "Due date" field from parent issue onto a child sub-task when the sub-task is created.
Issue: I've currently applied the "Copy Value From Other Field" at Step 1 of the issue workflow at the "Create" transition as the last entry on the Post Function list but it doesn't seem to be working. The sub-task issue type is part of the same workflow as the parent issue too. However, when I create a new sub-task after applying the changes, it's not copying the due date from its parent.
Any ideas why this might be happening please? Not sure whether it's a workflow issue, a transition problem or whether it's being applied at the wrong stage?
Thanks.