Hidden topics or grade items cannot be enabled for students in the gradebook

When an instructor hides a topic or grade item on the course page, the grade item(s) are then hidden in the gradebook. The instructor should be able un-hide the grade item in the gradebook. From the instructor view, it appears that the grade item is visible when switching roles. However, when you log in as an actual student, the "un-hidden" grade item(s) are not visible to the student.