I'm trying to create issues in a project using the Import Issues from CSV function (Filters->Advanced Issue Search). I've managed to overcome a number of issues, including using the UserID as opposed to email address to populate a custom user picker field.
While I can set other fields just fine, including Reporter (using email address) I can't seem to set the Assignee. The import validates but the Assignee is always set to "Unassigned" when the issue is created. I've tried using full email address, email prefix (before the @) and UserID but nothing works.
The ONLY way I have managed to achieve setting the Assignee is to use the External System Import method as a Jira Admin. That works fine but of course, then my notification automation rule within the project doesn't run. My question is WHY can I set the Assignee using one method and not the other? I want people within the Project to be able to regularly import issues and not rely on Jira Admins.