@Marc-BW I moved your comment into its own thread, because what you were asking for (the password field not to be cleared) is essentially the opposite of the proposal in the feature request thread where you had posted.
As @DenBesten already pointed out, the behavior that you are experiencing is not expected, and may be indicative of a bug or a faulty installation.
In which Bitwarden app (or extension) do you observe this password-clearing behavior? What is your operating system? Please also give version numbers for the app/extension/OS.