What happens: After logging in via mobieusID, a red "Sign-in failed. Please try again." flash message briefly appears even though the sign-in succeeded and you are logged in.
Expected: No error message on successful login.
Repro: Log in normally. Happens intermittently, more common on fast connections where Zitadel auto-replays.
Root cause: Duplicate OIDC callback fires after the first one consumed the session state. The error flash survived through the /login -> /auth/zitadel/start redirect chain (no page render to consume it) and appeared on the landing page.
Fix: Deployed. If the callback fires without session state but the user is already authenticated, redirect silently instead of flashing an error.
Status: Verified fixed.
Patrick Bass
@mobieus