I am currently working onusers' feedback.
The issue states that course overview block (visible on the dashboard) "incorrectly reports to students that quizzes need attention". What happens is that when a quiz has a due date, and the due date is in the future, then the dashboard will display this quiz. This, regardless of the current attempts made by the student, whether they can still attempt it, or even if they've successfully passed it. Note that it also does not account for extensions that may have been given to the student.
The assignment module suffered a similar issue which was fixed in MDL-47172
There are a few ways we can fix this, which one would you vote for?
Stop reporting the quiz as needing attention when:
A) The last attempt made was finished (submitted).
B) Attempts are no longer possible, regardless of the state of previous attempts.
C) There was at least one finished attempt, regardless of the state of previous and current attempts.