Unable to use alternative password app autofill on IOS on local sites

Ever since the latest update I have been unable to use alternative password managers (Bitwarden in my case) to autofill passwords on IOS devices. I run a home server, so any local domain on my network defaults to using the Firefox password manager instead of the Bitwarden password manager. It seems like most websites with a proper domain work (for example, if I visit one website internally I get the Firefox password manager, if I visit the same site via my reverse proxy/domain I get the Bitwarden prompt for password entry).