On Jira Cloud if I click on the Assignee field of an issue, the dropdown menu shown populates with only my own user account and Unassigned. However, if I follow the link in the upper left out of the issue quick view to view the issue in a separate browser tab and then choose to view the issue in the old view, I can open the Assign dialog and assign the issue to any user account. Is this more likely a bug or a mis-configuration?