In the View/grade all submissions page, it is possible to filter by First Name letter, Surname letter and Page.
If you enrol many students (more than 10) and filter by First name letter and click on Quick granding checkbox it respect the filter and doesn't reset the user list.
However, if you select a page (can be page 2), and then click on Quick grading check box, it loses the pagination and reloads to the first page. This can be really annoying if you have many students enrolled.
The expected behaviour would be preserve the Page filter after click on Quick grading.