To be candid, this comment is off topic, and I’d argue this topic should be closed.
If you have a support question for Bitwarden, it’s likely better to direct it to them. The behavior you are seeing is entirely expected, as to prevent “shoulder surfing”, or people seeing your passwords while they are looking at your screen. You should click the “copy” button, don’t copy/paste the stars. Or for a better UX, consider looking up the hot keys for auto filling on web pages if you use the extension.