I have. I use 1Password for about a year now. But I didn't log out (hence log in) of github since I installed it and as a result it (1password) doesn't know my github password. And frankly nor do I. So my point is valid, at least until next time I have to relogin.

Case in point: I also use Authy with backup, but I don't store my backup password in the password manager, because that would be a potential single point of security failure. The app kindly asks for a backup password occasionally. It's not for access, but for reminder. In fact if I don't remember my password, I can reset it right there in the app. I find that feature very useful.