So maybe it wasn't the Google Play update if some of you had the same thing I did on startup yet are still on the November update? At least I know it wasn't just me and probably nothing to worry about.
I got curious and checked on my 4XL, in the bottom left corner said to reboot, I did, it loaded something but the site still says 11/1/21 as it was before I rebooted. Weird....
My 3XL did the same thing today as well.... I also figured it was a Play System update, but I'm still on November 1st. That's the first time I've ever seen that particular type of update, with a percentage showing, on start up before though.