I'm not sure then. The first two "after" examples were blank for me. I tried again now and the first loaded, but second did not. After another few refreshes, it did load, though as you said the "copy and paste" link was blank.

I tried it in Firefox and got an XML parsing error[1] instead. Again refreshed and it loaded fine. So it seems intermittent at best.

[1] Error follows:

  XML Parsing Error: mismatched tag. Expected: </link>.
  Location: https://www.feed.style/example.xml?feedurl=https%3A%2F%2Fnews.ycombinator.com%2Fshowrss
  Line Number 6, Column 3: