Working with Moodle 3.5. I have a Certificate activity at the end of a course. Course completion settings are set to mark the course complete upon viewing the Certificate/last activity. My reporting indicated that a few users had not completed the course but upon reaching out, they were able to provide me with the certificate from the course proving they viewed the certificate and further more viewing the last activity.
Again, for some users it's working fine and for others this is the problem i'm having.
Are there any reasons why Moodle 2.5 is not marking the activity complete/course complete upon the learner viewing the activity?