As a Student; in a Canvas enviornment under a course under the grades link there is a webpage that loads with all the students grades. Next to the 'Grades' link there is a number indicating the incremented number of assignments that need to be reviewed. The new student grades/comments that are incremented are shown with a blue circle in the upper left hand corner of the assignment indicating that grade/comment needs to be reviewed in each assignment. Each Assignment title and comment need to be clicked in to to trigger the decrement of the number next to the 'Grades' link in the course for the student.
A solution may include giving the user or admin the choice of how the Canvas system checks to see if the user has reviewed the assignments and comments under 'Grades' to better meet the preferences of the user or administration. One of the ways you could achieve this in programming is trigger the blue bubble to disappear as soon as the HTML is scrolled through a certain point on the webpage. You could code this directly in to the HTML or use a JavaScript to implement a solution.
