Quiz only visits 60% of the questions when the RETRY button is used, when person fails first attempt

My current project involves a quiz where the questions are not consecutive but are dispersed throughout the course. The questions are all checked off on the quiz results slide.  The quiz considers all 20 questions on the first attempt as the learner advances through the course. If they do not initially pass they will review or use the RETRY button. When this happens the course only visits half the questions so the subsequent attempts are failures because of this.  What am I missing ? 

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