I figured it out by myself; shame on me for reporting this
But I report something else: I was not able to satisfy the @discobot with my images. I sent that unicorn 3 times and that other dog 1 time- and the system did not swallow them
And maybe that is another manifestation of the same problem but if I am not mistaken, I not able to see images, even if I am logged in and reading my own topic. I think I saw that behavior earlier, but today I am sure of it. As in the Can spectrogram lie about audio quality? - #20 by stevehero I had to click to see what @stevehero had posted as images; and then when I replayed [quoting him], those images of his suddenly became visible between the blocks of text. Or maybe that is how it works- you have to click first a link to image, to "paste" it to the text of a post that you are reading?