I just looked at the access report for a student. I noticed several visits to one of many "new quizzes" in the course but didn't see the submission date that I typically see next to an assignment, quiz, or discussion posting. I had to track down this date in another way to report last significant activity for financial aid purposes.
I didn't see this behavior noted in the known issues document, so thought I would raise awareness.
As it's been a few months since you originally posted this question, I'm wondering if you are still able to replicate this behavior?