Thanks for the screenshot. I'm not seeing it in Firefox 79.0 (or Chrome 84.0) but don't have ESR handy. There should definitely be a horizontal scrollbar there.

@Monica Can't say this is exactly what @Canina is seeing, but I would say so given their screenshot. The scrollbar is there alright, but you have to scroll down to see it because of how the page is layed out.

There is a code element inside of a pre element. The code element has a horizontal scrollbar, while the pre element has a vertical scrollbar. This means that the horizontal scrollbar, as part of the inner code element, can be scrolled out of view.

@MonicaCellio What @Moshi wrote matches the rendering in my browser: there actually is a horizontal scroll bar, but I completely overlooked it because one has to scroll to the bottom of the embedded scrollable code to see it. If I overlook it, I can't imagine how confusing it might be for less technically savvy users.

Yeah, if it's not visible from the start, we can't expect people to know about it. I see now -- this specific example is just short enough that the horizontal scroll is evident for me. But on https://software.codidact.com/questions/277881 the code block is longer and the scroll doesn't appear from the start. That might be a better example.