Odd bit of trivia
I never noticed before but the password field on the router login screen once you start typing shows a little symbol at the right end of the entry box. If you press that symbol it displays the characters that have entered with the interspersed superflous characters that were added.
Have to believe it's purpose is so that you can check what you actually entered. Unfortunately it apparently doesn't work with Chrome but does with IE - at least with IE v11
Also it doesn't show once the logon window has lost focus