When a teacher goes to view the answers to essay questions in a quiz, they can't see the student's answer when they first pull up the page (e.g. /mod/quiz/reviewquestion.php?state=1031944&number=53 ).
However, if they click on the edit button (on the upper left), and then click cancel on the following page, the answer is then shown. I tried debugging the script, but haven't been able to find where the essay answers are being loaded, and why they wouldn't be loaded initially.
I've attached a couple of screenshots to illustrate the problem.