How to prevent learner from continuing if the don't pass quiz

I have several scenes, at the end of each is a quiz that they must pass before the move to the next section or scene.  I've customized the buttons on the Results slide so that if they don't pass they must retake the course but I noticed they could still continue on by clicking on the next topic from the navigation.  Is there anyway to prevent them from continuing unless they don't pass the test? 

Thanks for you help.

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