Exactly, I show you in picture the advanced part. This part of the green arrow disappears after validation of the article. That is to say that if you want to edit, you can only edit the image part, namely which one you want to highlight first.
And that's all that's left in the advanced part, after to edit.
I hope I am in the right place to report this bug.
And image by editing advanced part, seeing only that.
Thank you for screenshots, we will enable editing description with next update