Unity 5.5.2 IOS IAP RestorePurchase IPV6 Support

IOS RestoreTransactions return false. IPV6 Environment Unity Version : 5.5.2f1

Apple Reject - We discovered one or more bugs in your app when reviewed on iPad Air 2 running iOS 10.2.1. Specifically, the app displayed an error message when the user tapped on the Restore tab.

Please run your app on a device while connected to an IPv6 network (all apps must support IPv6) to identify any issues, then revise and resubmit your app for review.

Please. help me