Here at CSUMB IT we have noticed a reoccurring issue with the quiz timer. When students are in the quiz sometimes the timer stops them short around 4minutes before or after the timer is actually suppose to run out.
Its an even bigger problem for short quizzes that are around 5 minutes, such as one test we tested, 2 out f four tries the student only had 45 seconds before the quiz closed.
Sometimes the timer doesn't match the timer on a students page, for example quiz is 20mins, but the students page says 22, and it doesn't save their answers.
(We are using moodle version 2.5)