I have 1 user who's in a PM role that needs to be able to set Next Assignee on tasks but when he goes to type a name in that field, it never lists any users. I've gradually given him all the permissions in the project, and now he has the Project Admin project role and still can't do it. We have others that can, and for the life of me, I can't see any difference between them. Any ideas what Jira permission he might be missing or what might be conflicting with his Project Admin role?