>The solution that worked in the current version of Chrome was to use
>
>

autocomplete="new-password"

>
>I haven't tested in other browser versions, though.

You may be fighting a losing battle with this one. A fix now may not work on future versions (or other browsers).
Also it may upset users who *want* autofill to work.
I'd concentrate on making sure the fields are populated correctly if Autofill is on and let the user be responsible for disabling it if they so wish.....