collapsible items in atto insertmedia don't work in assignments

Make sure your site has the developer debug messages enable ( mdk run dev if you're using mdk) Log in as admin Create a course Enrol a user in the course as a student Add an assignment to activity to the course and make sure the "online text" option is checked for allowed submission types Log in as the student Go to the assignment and click to add a submission Open the browser console In the "online text" section of the submission form click on the media button (looks like a film camera) in the editor toolbar Confirm that the M.form.shortforms is not a function error is not reported in the browser console Click the "video" tab in the insert media modal Confirm that each of the collapsible regions (Display options, Advanced settings, Subtitles and captions) in the short form can be expanded and collapsed