Note that, there have been other related changes in master since 3.11, so it is particularly important to test this on all branches. Pre-condition: Navigate to Site admin -> Plugins -> Quiz -> General setting Set the auto-save delay to 5 seconds Create or navigate to an existing course Turn editing on and create a quiz Create an essay question in the quiz: Set the "Response format" to "HTML editor with the file picker" Set the "Allow Attachment" setting to "2" Case 1: The student uploads file by D&D In a different browser, log in as a student Start an attempt on the quiz but do not answer the question Leave the essay section blank Upload a file using Drag & Drop upload to the file mmanager below the editor Wait for 5 seconds Stay on the page... Switch back to the browser where you are logged in as a teacher View the quiz and click on the "1 Attempts" link Review the attempt made by your student Confirm that the file is shown Case 2: The student uploads file by file picker Back as the student Use the "Upload file" button (top-left corner of the file manager) to add a second file using the file picker Wait for 5 seconds Stay on the page... Switch back to the browser where you are logged in as a teacher View the quiz and click on the "1 Attempts" link Review the attempt made by your student Confirm that both of the files are shown Case 3: Delete file upload Back as the student Click on the file in the file manager Click the "Delete" button and confirm the deletion Wait for 5 seconds Stay on the page... Switch back to the browser where you are logged in as a teacher View the quiz and click on the "1 Attempts" link Review the attempt made by your student Confirm that no files are shown