Ask HN: Where has the number gone?

Recently checking on something an I noticed an odd thing. Here's a usual listing: 5. What Hackers Can Learn From SF Fandom: ... 3 points by RiderOfGiraffes 3 days ago | 4 comments See how the number of comments is given. Here's another: 8. Terrence Tao: "Hooked for Life" on math (cnn.com) 1 point by RiderOfGiraffes 6 days ago | comments On this item the number of comments isn't listed, even though there is, in fact, a comment. I suspect it's an odd interaction between features, and perhaps the item has been killed or something, but it didn't seem to be consistent, and seemed to change when I reloaded a page. I was wondering if someone else has noticed, and if they know the reason.