Studio quiz results not showing

Community Explorer

I'm using the Canvas Studio quizzing feature for the first time this semester, and it's been working great; grades are loaded into the grade book as they should be, and students have not reported any issues. HOWEVER, when I click on the Quiz Results tab, I see nothing. The other tabs (Details, Insights) work fine, but no quiz results. I've tried it on Chrome and Firefox with the same result. Any thoughts?

Quiz results.png