[epicalex]

I believe the British Airways site still does something similar to this, or it did until very recently if it's been fixed. Add a password that is too long, it gets truncated and the truncated version saved with no warning or error.

It took me several password reset attempts to realise what was going on, as my literally just set and password manager-saved password didn't work.

I think in BA's case the password input also had a character limit on it, which is ultimately how I realised what was happening, even though there was no info anywhere that such a limit existed.