You have a project with several issue types, associated unique workflows, and a number of components.
The decision has been made to have all new issues assigned automatically.
To that end, you've set default assignee(s) for the project lead, component leads, and removed the Assignee field from the screens associated with the Create Issue operation.
One of the issue types is still being created without an Assignee.
What is the most likely cause of the problem?