Assignment save and show next does not work for 1 user.

Pre-requirements: Log in as admin Create a course  Enrol several students in the course Create an assignment activity for the course Test 1 Suspend all course students except for one Go to 'Site home' Click on the course link Click on the assignment activity link Under 'Grading summary' click on the 'Grade' button Add a grade in the Grade section Click on 'Save and show next' button Make sure that the view has been refreshed with the new changes (ex. the 'Current grade in gradebook' has been updated) Test 2 Log in as one of the students which are enrolled in the course Go to 'Site home' Click on the course link Click on the assignment activity link Click on the 'Add submission' button Upload a file and click on the 'Save changes' button\ Log in as admin Go to 'Site home' Click on the course link Click on the assignment activity link Under 'Grading summary' click on the 'Grade' button Click on 'Save and show next' button Repeat steps 11 and 12 several times and make sure that the grade is assigned and the next student for grading is displayed after Change the filters by clicking on the filter icon and check the 'Submitted' checkbox Make sure that only one user is now displayed (The one that submitted the submission) Add a grade in the Grade section Click on 'Save and show next' button Make sure that the view has been refreshed with the new changes (ex. the 'Current grade in gradebook' has been updated)