I have a new problem with deleting lessons in Chrome: When I open a course and try do delete a lesson, the window with the security question, whether I’am sure, opens behind the window with the course. So I always have to close the course first before I can confirm the deletion and then I have to open the course again to delete the next lesson, having the same problem with the windows.
Since deleting lessons on the Android Apps doesn’t work at all, this is pretty annoying.