This idea has been developed and deployed to Canvas
Several times, when grading with a rubric, I find that I have navigated away from the rubric without saving the marks. Is it possible to add a warning that the rubric markings have not been saved when I attempt to navigate away? I believe that sometimes this happens because I added comments at the bottom of the grading page, and only hit that "Submit" button, but not the Save button for the rubric. Perhaps that Submit button could take care of both the rubric and the comments?