STPApplePayContext hangs after didAuthorizePayment on iOS 26 + React Native New Architecture — "Payment Not Completed"

Start in StripeApplePay/StripeApplePay/Source/ApplePayContext/STPApplePayContext.swift around _completePayment and the PaymentMethod.create completion, then reproduce the flow on the listed iOS 26 and React Native New Architecture environment. Trace why the completion does not return; done means confirmPlatformPayPayment settles and the PaymentIntent is confirmed without Apple Pay showing “Payment Not Completed”.

STPApplePayContext hangs after didAuthorizePayment on iOS 26 + React Native New Architecture — "Payment Not Completed"

Describe the bug

When a customer pays with Apple Pay via @stripe/stripe-react-native's
confirmPlatformPayPayment({ applePay: ... }), authorization succeeds
(Face ID), the sheet dismisses to a spinner, and the payment never settles —
ending with Apple Pay's "Payment Not Completed". Reproducible on iOS 26.x
devices under the React Native New Architecture (Fabric) + Hermes.

Native instrumentation confirms that on iOS,
confirmPlatformPayPayment({ applePay }) invokes STPApplePayContext.

React Native implementation (failing path)

// @stripe/stripe-react-native 0.74.0 (bundled Stripe iOS SDK 26.6.0)
import { confirmPlatformPayPayment, PlatformPay } from '@stripe/stripe-react-native'

const result = await confirmPlatformPayPayment(paymentIntentClientSecret, {
  applePay: {
    merchantCapabilities: [
      PlatformPay.ApplePayMerchantCapability.Supports3DS,
      PlatformPay.ApplePayMerchantCapability.SupportsCredit,
      PlatformPay.ApplePayMerchantCapability.SupportsDebit,
    ],
    merchantCountryCode: 'HK',
    currencyCode: 'HKD',
    cartItems: [
      {
        label: 'Order',
        amount: (amount / 100).toString(),
        paymentType: PlatformPay.PaymentType.Immediate,
      },
    ],
  },
})

The promise returned by confirmPlatformPayPayment never resolves or
rejects after authorization. We confirmed this by wrapping the call in a
Promise.race with a 90 s timeout plus an AppState watchdog — the
timeout/rejection fires, but Stripe's completion never does.

Root-cause evidence (instrumentation)

We instrumented StripeApplePay/StripeApplePay/Source/ApplePayContext/ STPApplePayContext.swift with NSLog + NotificationCenter posts and
forwarded them into Sentry. Every failing payment shows this exact sequence:

1. presentApplePay completion fired
2. didAuthorizePayment fired ← Face ID authorization accepted
3. _completePayment started
4. … nothing after

Confirmed absent in every failing case:

• PaymentMethod.create completion fired — never logged
• handleSuccess / handleFailure — never called
• didCreatePaymentMethod / didCompleteWith — never called
• No App Hang / ANR event captured — the main thread is not blocked

Conclusion: the flow stalls inside STPApplePayContext after
_completePayment begins — most likely the PaymentMethod.create network
call (or its completion handler) never returns.

To Reproduce

1. React Native app with New Architecture (Fabric) enabled, Hermes.
2. @stripe/stripe-react-native 0.74.0 (bundled Stripe iOS SDK 26.6.0).
3. On an iOS 26.x device, call confirmPlatformPayPayment with an
   applePay config (see snippet above) for a live PaymentIntent.
4. Tap Apple Pay → authorize with Face ID.
5. Observe: spinner → "Payment Not Completed".

Expected behavior

confirmPlatformPayPayment resolves and the PaymentIntent is confirmed.

Actual behavior

The promise never settles; Apple Pay shows "Payment Not Completed".

Environment

• React Native: 0.83.10 (New Architecture / Fabric enabled)
• JS engine: Hermes
• @stripe/stripe-react-native: 0.74.0
• Stripe iOS SDK (StripeApplePay pod): 26.6.0

Devices

• iPhone14,2 — iOS 26.6
• iPhone14,3 — iOS 26.6
• iPhone15,3 — iOS 26.5.2