If it helps any, here's the post you made that describes it most simply without needing to go 5 or 6 levels deep of self reference to the same question: https://news.ycombinator.com/item?id=26156901
(I had to click a lot of "here's a post where I explained it before" links that had "here's a post where I explained it before" before I found this one)
My bad, yeah, that one. Using Materialistic on Android and I guess the "copy link" choice in the "share" menu associated with a comment doesn't actually copy the comment link, despite the clipboard contents saying "Comment by [user] - [url]". Never noticed that before, so I'll submit an issue/fix if I can, and if I can't then I'll be more careful next time, thanks!
Edit: or, to dereference all the way: https://news.ycombinator.com/item?id=26158300.