Limited reporting options (particularly audio and image exercises)
Independent of a particular course, I often get sentences where I am not able to correctly report mistakes, simply because the correct option is missing after having pressed the "report" button. Most often this happens in audio or image exercises. The latter frequently have the additional flaw that it is even impossible to leave a comment, because there is no "discussion" button!
Please fix this. The best solution would be to admit every possible option for all the sentences. I would even favour the re-introduction of a free-text option (like it has existed in former times).