This has only been observed in quizzes, but does not always happen. I am not able to reproduce the bug, although I can see that it happened for these students.
Is this a known issue? Does this have more to do with what browser/OS the student is using than WBWK? More to the point, does anyone have a suggestion for dealing with this?
The only case where I've seen something like this was with < and > signs being removed by an HTML scrubber, which doesn't quite sound like what you're seeing (and occurred in homework). What WeBWorK and PG versions are you using, and what in which problem are you seeing this behavior?
Gavin, it is WBWK 2.8 and pg 2.8.1. It happened for all nine problems in a particular quiz that had inequality problems. Since the instructor has all nine problems on one page, I think it is quite likely that Paul has it, and that the students were spending over 30 minutes finding answers before hitting submit.
Paul, I have experienced the same thing while editing, and it is annoying. I copy the whole problem to a different editor where I can mass search-and-replace all of the special characters. But I had not associated this with logging out due to inactivity. I'll bump up the logout time for the course and hopefully that will fix this for now.