@tooki:
Thanks for the interesting link!
I nailed it, though. Digikey suddenly doesn't like ExpressVPN, which I've had for two years, always running. Turn off, get in. Turn on, hang up, repeatedly. I'm not terribly averse to turning it off for Dkey, just inconvenienced.
I've seen this on state and local government websites too, possibly intentionally without saying so as a means of spying or defeating hacking.