Vanguard.com blocking
I've been using vanguard.com for many years and have always been able to login using 1Password on Mac or iOS. Today, however, when I filled in my username and password using 1Pw on the Mac, Vanguard gave an error message along the lines of "Can't login with a script."
I was able to copy and paste the password to log in,
So it's only an inconvenience, but I hope 1Pw can work with Vanguard to eliminate it.
Using Safari on Mac mini M2.
Well, I restarted the Mac and haven't had the problem again.
This Mac has had a lot of flakiness since I've had it so I would guess that's the root of the problem rather than something with 1Password or with Vanguard changing its security protocols.
So you can consider my case resolved for now.
Best regards,
Don
PS Thanks for the heads up on the "Don't sign in automatically" option, which I hadn't been aware of.