Pressing Back, refreshing, or clicking sign in twice could replay a Google callback that had already been used. That correctly failed a security check — but it then dropped you on the marketing homepage with nothing to read. If you were already signed in, it looked exactly like being logged out.
Now:
- If you are still signed in, the replay is invisible and you go straight back to your dashboard.
- If you are signed out, you get the login page with the reason written in plain words.