I'm changing rank on issues in a Plan using Advanced Roadmaps.
The issues come from several different projects, but all the projects are company-managed software projects.
When I committed the changes, all the issues were updated except 3. I get this message on the final 3.

Contacting my administrator doesn't help, because I AM the administrator. LOL
I'm trying to decide what the "unknown reason" could be. The only thing I can think of is that the issues have Security applied so that only the Assignee and Reporter can see them.
Would this affect Advanced Roadmaps ability to alter the Rank?
Thoughts?
Other reasons that might cause an issue with ranking?