I haven't come across this issue before, but it is giving me fits. I've got two items in one module, an assignment and a quiz. For both of these, there are different due dates for two sets of students in the class. The module, assignment, and the quiz are all published. The assignment is viewable right now, while the quiz has a delay for the next day.

When I go into student view, there are no items in this module. A student in the class has confirmed that they can indeed see both items in the module and they are behaving as designed. This is my most recent module and all earlier modules have been behaving fine.

I've tried this across multiple browsers, reloaded pages, cleared cache and reset the student all to no avail.