I tested with the following test steps:
- Connect as admin.
- Create two essay questions
- Create a quizz
- Edit quizz (Navigation: quizz administration) and add two random question (with the two previous essay questions). The quizz should have two page with a random question of each page.
- Connect as student and answer quizz.
- As admin I tried to view the attempt (/Moodle_Integration/mod/quiz/report.php?id=5&mode=overview)
Just after the following text "Showing graded and ungraded attempts for each user. The one attempt for each user that is graded is highlighted. The grading method for this quiz is Highest grade.", I can see this exception: