Why can't Firebase Emulator trigger an event for EmailVerifiedAction?

[cupidchan]

I am using Firebase Emulator to test for User Registration based on this example: https://github.com/firebase/flutterfire/blob/master/packages/firebase_ui_auth/example/lib/main.dart

The emulator successfully generated the link: http://127.0.0.1:9099/emulator/action?mode=verifyEmail&lang=en&oobCode=ZJIl7jQ26ZMqribJt8zSmMvFNjL_KGv9GDK7ApDsqPwetWCkz0_gFR&apiKey=fake-api-key&continueUrl=http%3A%2F%2Flocalhost%3A50707%2F

When I paste this link to browser, I found out that the emulator switch the "Verified email?" for the user to true. However, my Web is redirected to Sign-in screen, instead of profile page. My gut feeling is the wrong url setting of the ActionCodeSettings but I cannot manage to make it work. Conversely, it works fine if I connect directly to Firebase server. Is this a known issue?