Login admin and go to "Site administration -> Development -> Debugging" and set "Debug messages" to "DEVELOPER" level. Create a course in Topics format with at least ten topics. Go to the course and note down the course ID from the URL (you will need in a later step). Click on "Collapse all" to collapse all sections. Collapse all sections from the course index. Refresh the page. Open the browser console (usually F12). Execute the following commands replacing COURSEID by the course ID you note down earlier:   M.reactive.CourseEditorCOURSEID.dispatch('sectionContentCollapsed', [M.reactive.CourseEditorCOURSEID.stateData.section['1']], true);   M.reactive.CourseEditorCOURSEID.dispatch('sectionIndexCollapsed', [M.reactive.CourseEditorCOURSEID.stateData.section['1']], true); Refresh the page after a few seconds. Check that all sections are still collapsed in both course index and course content.