This particular course is about 90 questions long, each question having an associated question pool. When a user tries to take the test, it initially load fine, but it eventually chokes up when loading the next question.
The browser displays a 503 http error (service unavailable) when this happens and it can not finish loading the page. At this point, the user is forced to close the window that the course is in and they have to re-login into Moodle.
My hunch is that the cause for this is that HTML5 breaks up the data transfer between Moodle and the Scorm course into individual HTTP requests. Due to the amount of data Scorm is trying to exchange, it hits some kind of limit in either PHP or IIS that restarts the current session / application pool (which is why the user gets logged off)
Interested if anyone has had a similar experience or if anyone has suggestions on how to limit scorm requests.
Other info: Moodle version 3.1+ on IIS hosted on a dedicated Windows server with plenty of resources.
