(Off-topic warning) the speed of your reply implies to me that you have some way of being directly notified of HN replies. What software do you use for that and do you like it?
For what it's worth, I will sometimes just check the "threads" link at the top of the page and happen to see a response minutes ago (or less) to my comments. It's possible that happened here.
https://www.hnreplies.com/
For what it's worth, I will sometimes just check the "threads" link at the top of the page and happen to see a response minutes ago (or less) to my comments. It's possible that happened here.