Another issue here. I created an offer code and selected "No, this code will replace the introductory offer", and the code generated marks "Yes, customers can redeem both an introductory offer and this code". Not sure if this is a display problem or the setting just didn't take effect.

SKReceiptRefreshRequest also failed with below error: Error: Optional(Error Domain=SKErrorDomain Code=0 “An unknown error occurred” UserInfo={NSLocalizedDescription=An unknown error occurred, NSUnderlyingError=0x283d763a0 {Error Domain=ASDServerErrorDomain Code=500332 “Unhandled exception” UserInfo={NSLocalizedDescription=Unhandled exception, NSLocalizedFailureReason=An unknown error occurred}}})

Same crash every time before unit testing..

I've also tried it on my own project, it behaved the same. Furthermore, when running on the real device, detach was called only on purchasing then never got called again. But the renewal transaction could be found in the receipt using the old way.