Data loss when submitting rubric form after session time-out (rubric grading)

Manual testing As admin create teacher1, student1 Create a course Course1 and enroll teacher1 as teacher and student1 as student in the course. Login as teacher1 and create an assignment "Assignment1" in Course1. 1. Make sure to have "Grade" -> "Grading method" selected as "Rubric" 2. Click "Save and display". 3. You should see the advanced grading page now. 4. Now let's click on "Define new grading from scratch". 5. Give a name to the rubric 6. Now click on "Click to edit criterion" 7. Add as many criterion you like for instance:      a. Grammer, Poor(in click to edit level), Ok (in next click to edit level), Good (in next click to edit level)       b. Style, Poor, Ok, Good, etc 8. Now click on "Save rubric and make it ready". Now log in as student1  1. Go to Course1  2. Navigate to the "Assignment1"  3. Submit some data in the assignment. Now as admin, set ` $CFG->sessiontimeout = 80; ` in config.php # Now login as teacher1. Navigate to "Course1" > "Assignment1"  and click the "Grade" button at the bottom. Click on the rubrics criterion you see also share some feedback on the text area( not in the atto editor) Do not click on the "Save changes" button and wait for 1 minute or 60 seconds. You should see the page reload with the message "The changes to the grade and feedback were saved".