Got beta release on production channel

After the most recent 1P auto-update, I ended up with a beta:

despite being on the Production channel:

I only noticed it when I couldn't find 1P in my Dock, which it turns out is because the icon was different 🙃. I have been on the beta channel before, but I've been on Production for at least the last year or two.

I looked in the Updater log files for anything interesting, but there was nothing of note in there. I also didn't see anything relevant in the main log file, but it's got many more messages; if there's something specific you want me to search for, I can do that.