HypersomniacLive: Mine still show.
Cavalary: So do mine, so far...
Thanks you two. I was using a private browsing window, so after posting it occurred to me to try with a normal browsing window. When I logged out and then signed in with a normal browsing window, the numbers showed up. I tested it again by signing in with a private browsing window again and the numbers didn't show up.
Unfortunately, after going back and forth a few times, the Google "I'm not a robot" box showed up in the login panel for the private browsing window. So I gave up further testing. Nonetheless, it was consistent: normal window had the numbers, private window didn't.
However, that doesn't completely explain it. I always use a private browsing window and the numbers use to show anyway, so I don't know why they stopped for a couple days (that day and at least the day before). And, now it's several hours later (pretty much next day) and I've signed in with a private browsing window again (and braved the robot test), and the numbers are there again.
So, I'm not sure it's the private browsing window. Though, if the numbers do disappear then it seems possible to get them back by switching to a normal browsing window until the numbers feel like coming back with a private browsing window.
So, I guess it's just an anomaly rather than anything broken...