I just took a quick look and found this line
if ($recs = $DB->get_records_select( 'question_categories', $select, null, 'id,name')) {
Which implies that it does use components from the quiz engine.
Are you in a position to pay for people to fix these bugs. The pay rates of even the most experienced moodle devs does not bring envy from Kings and Princes and sometimes these things can be fixed quite quickly.
I am not offering myself by the way, I have more than enough things to keep me busy.
if ($recs = $DB->get_records_select( 'question_categories', $select, null, 'id,name')) {
Which implies that it does use components from the quiz engine.
Are you in a position to pay for people to fix these bugs. The pay rates of even the most experienced moodle devs does not bring envy from Kings and Princes and sometimes these things can be fixed quite quickly.
I am not offering myself by the way, I have more than enough things to keep me busy.