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The app get fail result from the StoreKit for reason SKErrorUnknown, but the user's bill does have this record. How this happen, and what can i do to avoid it?This is user’s bill screenshotThis is my log2017/11/28 09:53:52:273 beginPay productIdentifier:CNY12_NONRENEWING2 —— marked [[SKPaymentQueue defaultQueue] addPayment:payment]2017/11/28 09:53:52:273 in payment productIdentifier:CNY12_NONRENEWING2 orderNumber:TBUY201711288664852 —— marked paymentQueue:updatedTransactions with transaction.transactionState is SKPaymentTransactionStatePurchasing or SKPaymentTransactionStateDeferred2017/11/28 09:57:12:450 fail to pay productIdentifier:CNY12_NONRENEWING2 orderNumber:TBUY201711288664852 —— marked paymentQueue:updatedTransactions with transaction.transactionState is SKPaymentTransactionStateFailed2017/11/28 09:57:12:450 fail reason:SKErrorUnknown productIdentifier:CNY12_NONRENEWING2 orderNumber:TBUY201711288664852 —— marked in paymentQueue:updatedTransactions, transaction.error.code == SKErrorUnknown

environment: iPhone11 & iPhone8p；iOS14 beta4 Steps to reproduce： Uninstall the app Reinstall Call [PHPhotoLibrary requestAuthorizationForAccessLevel:] or [PHPhotoLibrary requestAuthorization] Choose limited，then system present a picker Scroll down to collapse then picker The function called in the third step has no callback Continue to call the requestAuthorizationForAccessLevel: or requestAuthorization，no callback