FWIW, I was already signed in to Google and I did not click any sign in links on any page at the time.
@spryce I received a prompt that said Microsoft was used to sign into the Community here. I was testing the Microsoft login pages but also had a tab open for the Community. Did you have the Microsoft login page open somewhere while logged into Google in another tab?
When I enter 1Password in full I get the following. Note that is says Run command rather than App:
That's very weird. I could not reproduce on two of my Windows 11 machines though. I have the 1Password 8 app installed. Could you clarify if you have that installed as well?