If you enter a text into the workshop mod description that is longer than the window size when visiting the workshop, the bottom part of the text is not shown. A scrollbar appears but you cannot scroll far enough down to see the rest of the description.

As the images below show, then the last line of "v1.0.4" is not visible on the ingame mod page, after pushing it as its shown, from the workbench. I have scrolled as far down as I could.

I discovered it first when it had eaten "Kex"s name, then added the "v1.0.4" to make sure the name was bumped into visibility. So have reproduced it twice in a row. I have not tried to reproduce it with an empty new mod, as I did not want to publish a new empty mod just to test it.

I would guess the scrollbar might not scroll far enough or the description text box is slightly clipping the bottom menu bar. A screenshot of the first test where the last line was "- Kex" shows that part of the "k" is just visible, so the text does exist, it just can't be scrolled far enough down to be shown.