Dear All,
First, I set the restrict access in the quiz activity (e.g. 2014-05-20), and hide the quiz, it will hide in the gradebook at first.
2nd time, i unhide the quiz activity, it show in grade book.
3rd time, i hide again the quiz activity, it still show in grade book and doesn't hide it at all.
I check on the database level, the 'hidden' column contain the restict access date which is 2014-05-20.
Is it a bug in Moodle 2.5.4 ?
Please advise.