Sometimes if you register an account on a website they also sent you a verification-code to your mobile. PW-Manager then thinks that's the new password --> you get asked if you want to update your PW for this account and if you are not careful and klick "yes" you have saved the verification-code as your new password for this specific website. This got me locked out of two accounts until I had it figured out... 🙁
Verification-codes shoul not be interpreted as new passwords.
Version 0.99.131.0.2-beta (WebKit 619.1.11.111.2)
Catalina (10.15)