Sorry, I meant that either they're not showing in the web interface (probably delay between web interface and log writing) or if they do, they're not showing as blocked.
I'll keep watching this, but it looks like cdn.optimizely.com was the culprit. Just took a long while to catch the issue.
Related... Is there a way to change the timezone for Pi-holes web interface? Seems like it's not using the time that my Pi is returning when I run date.