Btw, don't ever copy&paste from your password manager, if that's a problem

Maybe, but at least with my password manager, they'd only get passwords as I use them and not the keys to the kingdom when I open it.

The problem is, the weird way it is implemented in Edge and how MS handles the issue.

"Handles the issue" is a weird way to say they don't give a shit about protecting your passwords. They had to change this behavior, because chromium doesn't do this by default, so it's not really even negligence in Microsoft at that point. They chose to do this.