We have an app with IAP coin purchases. We've recently received mails from a few of our users, saying that they couldn't purchase any coins. I looked at their session logs and saw Failed IAP events, each with no fail reason logged. Here's the related code:

- (void)_purchaseRequestFailed:(SKPaymentTransaction *)transaction state:(StoreTransactionState)state error:(NSError *)error
{
    IAPProduct *product = [self getProductWithId:transaction.payment.productIdentifier];
    if (error.code==SKErrorPaymentCancelled) {
        [_metricsManager logFailIAP:product failReason:@"Payment canceled"];
    } else {
        [_metricsManager logFailIAP:product failReason:error.localizedDescription];
    }
    if ([_delegate respondsToSelector:@selector(didSucceedPurchasingProduct:)]) {
        [_delegate didFailPurchasingProduct:product];
    }
}

inside logFailIAP, I log things like time, UDID, event name, and the error.localizedDescription.

 if (failReason != nil && failReason.length > 0) {
        [metricsDictionary setObject:failReason forKey:MetricsEventParameterFailReason];
 }

In the logs, I'm getting Failed IAP events, but no logged reason for failing. Is there any case where, you get "SKPaymentTransactionStateFailed", but, have an empty error.localizedDescription? I can confirm that the logs work, and have seen errors like "Payment canceled", and "Cannot connect to iTunes" being logged in other devices. The issue is not specific to a device or iOS.

storekit in-app-purchase
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