Phone freezes (not just the app, the phone becomes unresponsive, impossible to go back to Home Screen) while signing in with a FIDO2/WebAuthn identity in a ASWebAuthenticationSession in our app

Number:rdar://FB9614681 Date Originated:10 September 2021
Status: Resolved:
Product:WebKit Product Version:iOS 15 beta 8
Classification: Reproducible:yes
In our app we are implementing WebAuthn support via a webauthn api provided by WebKit - we open a ASWebAuthenticationSession with our website that offers to sign in with a WebAuthn credential (biometric auth). After authenticating with TouchID the overlay stays on the screen forever and the app is not resposive, the home button on this iPhone 7 does not react. This is a regression from iOS 14.

(attached a video description of the problem)


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