[Bug]: Getting stuck on code verification (missing auth redirect flow)

[akaegi]

Preflight Checklist

• I could not find a solution in the documentation, the existing issues or discussions
• I have joined the ZITADEL chat

Environment

ZITADEL Cloud

Version

v2.51.4

Database

None

Database Version

No response

Describe the problem caused by this bug

When a user registers with the default Zitadel registration form inside our mobile app and instead of entering the code manually in the app clicks the "Verify E-Mail" button in the code E-Mail, the user is first sent to the browser and then not redirected to the app. Even worse, the app is "stuck" on the enter code page and the only option to the confused user is to cancel the registration.

To reproduce

1. Open app with configured auth_redirect_flow_cut
2. Do token exchange with prompt=create
3. Create user
4. When asking to enter code navigate to the E-Mail app (on iOS device or another device)
5. Click "Verify E-Mail" button in E-Mail

Screenshots

auth_redirect_flow_cut2.mp4

Expected behavior

The user is correctly redirected back to the app or at least the app (Zitadel registration form) automatically transitions to the "successfull login page".

The releated issue #7504 fixes this for Android (if E-Mail button is clicked on the same device) but not for iOS and if the E-Mail button is clicked on another device.

As a quick workaround, disabling the button "E-Mail verifizieren" in the verification code E-Mail would be helpfull as well.

Operating System

Device: iOS Simulator
App: Flutter app using oidc library and OAuth AuthCode+PKCE flow

Relevant Configuration

No response

Additional Context

No response

[akaegi]

Possible solution IMO:
Zitadel registration form polls Zitadel API for successfull E-Mail verification when on verification screen.