ASWebAuthenticationSession not working in Preview

class ViewModel : NSObject, ObservableObject, ASWebAuthenticationPresentationContextProviding {

private var authSession: ASWebAuthenticationSession?

  func signInWithOpenID(provider: OAuthProvider) {
        let url = getOIDCAuthenticationURL(provider: provider)
        
        authSession?.cancel()
        authSession = nil
        
        authSession = ASWebAuthenticationSession(url: url, callbackURLScheme: "com.ninjanutri") { callbackURL, error in
            if let error = error {
                print("Error: \(error.localizedDescription)")
                return
            }
            
            guard let callbackURL = callbackURL else { return }
            
            guard let idToken = callbackURL.valueOf("id_token") else { return }
            
            self.signInWithIdToken(provider: provider, idToken: idToken)
        }
        
        authSession?.prefersEphemeralWebBrowserSession = false
        authSession?.presentationContextProvider = self
        authSession?.start()
    }

  public func presentationAnchor(for session: ASWebAuthenticationSession) -> ASPresentationAnchor {        
        return ASPresentationAnchor()
    }
}

struct ContentView: View {
  @StateObject private var viewModel = ViewModel()

  var body: some View {
     Button {
      viewModel.signInWithOpenID(provider: .github)
     } label: {
        Text("Test")
     }
  }
}

when the prefersEphemeralWebBrowserSession is false, the alert and webview is totally working fine in Simulator and Real device, but not XCode Preview. Is this behaviour expected or it's a bug?