[Bugfix:Submission] Ignore empty preferred names (#7327)
[Bugfix:Submission] Ignore empty preferred names (#7327)


Submitty/Submitty,Submitty/Submitty,Submitty/Submitty,Submitty/Submitty,Submitty/Submitty,Submitty/Submitty,Submitty/Submitty,Submitty/Submitty,Submitty/Submitty