Our game application is developed based on StoreKit 1, and an exception occurs on iOS 26.4: after players complete a payment, the finishTransaction method fails to properly remove the transaction from the SKPaymentQueue; as a result, when players restart the app, the system still triggers the retry process for this transaction (reconciliation of unpaid orders).
Has anyone encountered this issue? If there is a solution, we would appreciate it if you could share it with us.
We started experiencing a similar issue on the day iOS 26.4 Beta 1 was released (2026/02/18).
Firebase Analytics is reporting a large number of duplicate in_app_purchase events for some users starting from that day. A few things we've observed:
So far we haven’t been able to reproduce it locally. It might be because our tests are using the sandbox or because our debug builds are compiled with Xcode 26.
So I can't say for sure if it's exactly the same issue as yours, but it looks quite similar.
Update: We were able to reproduce this with a minimal reproducible project and can confirm it's the same issue as yours.
the finishTransaction method fails to properly remove the transaction from the SKPaymentQueue
As per our investigations, calling SKPaymentQueue.default().restoreCompletedTransactions() triggers paymentQueue(_:updatedTransactions:), but the transactionState of that previously finished transaction is .purchased instead of .restored.
When running the same test on devices below iOS 26.4, the transactionState correctly returns .restored.
