My app uses StoreKit to implement individual purchases, subscription purchases, and more. It worked fine up to iOS14. However, on rare occasions, it doesn't seem to work properly on devices that have been updated to iOS 15. I thought it was an app issue. However, in this state, this user can't enter the account screen of the App Store, and the YouTube application does not start. I suspect there is a problem with StoreKit as this user will be temporarily fixed when the device is restarted. My development environment is React Native. I also reported to my StoreKit related library react-native-iap. There have been many reports of the same situation when using the SandBox. Of course, there is a high possibility that this library is defective, but what does it mean that a problem with one app affects the entire device?