I am in version 3.6.0.5. I have built a test using the docebo test module that consists of a question bank of 82 questions which it chooses 75 from randomly.  I have given the test a 120 minute time limit.  It also displays one question per page.

The problem I am running into is users are reporting that the test stalls durring it.  No specific place.  Different questions each time.  But becuase of the random nature of the test I don't know if it is a specific question despite its different location.  When it stalls it may or may not display any text.  The text that I have had reported that it displays is actually an answer and no question displays.  Also the next and previous buttons are not there so there is no way to eitehr keep going past the "bad" question or refresh the page.  Pressing refresh on the browswer brings the page back to the same display.  Below is a sample screenshot of what the use gets.

I was troubleshooting with users all day and what seems to be the consistant thing for users having trouble is Internet Explorer.  I have them try again in Firefox and they don't have any trouble.  I did have users run into the problem upwards of 15 times in IE before it would work, and in at least one case it never worked until he switched over to firefox.