Yes, you have a dead comment. It's probably due to some spam filter. https://news.ycombinator.com/threads?id=bubblegumcrisis shows up other comments of yours as dead. (at least when logged in with my account)

Maybe hit up hn@ycombinator.com and ask to remove your shadowban of sorts. Idk how effective is that.

Anyway something more concerning is that you have at least two flagged comments (in the first page at least). Flagged comments means your comments violated HN rules, at least according to other HN users. It's hard to understand the HN social etiquette but in short, if you are being mean to other people, you might get flagged. So it's largely about the tone of your comments rather than their substance. You may want to read the guidelines (the section "in comments") here https://news.ycombinator.com/newsguidelines.html