Students can access module pages from the Syllabus Course Summary list early

Community Champion

Hi all, 

I have set module release dates for all my modules. I just noticed that students are accessing pages and activities within modules that have not opened. The only way I have been able to duplicate this is by clicking from the Course Summary list on the syllabus page. I tested this from the student view and it is allowing me to view pages in modules that have not yet become available.  This is just in one of my courses, not all.  

Any ideas as to why?