Our app offers auto-renewable subscriptions using StoreKit Original API for In-App Purchase and App Store Server Notifications V1. Starting around 2025-03-15, we found some cases where original_transaction_id which was associated to web_order_line_item_id of already purchased subscription had changed in the receipt information of verifyReceipt response or App Store Server Notifications V1. The detailed steps are: Around February 2025, re-purchase from the app the same subscription product which was canceled and expired some time ago, using StoreKit Original API for In-App Purchase Receive the following 2 notifications from App Store Server Notifications V1 almost at the same time INITIAL_BUY DID_CHANGE_RENEWAL_STATUS In both notifications, latest_receipt_info contains the receipt for the re-purchased subscription period with new original_transaction_id and web_order_line_item_id pending_renewal_info contains both new original_transaction_id and original one which was generated at first purchase, and original one has "is_in_billing_retry_period": "1" Starting around 2025-03-15, the following happens When we receive another "DID_CHANGE_RENEWAL_STATUS" notification from App Store Server Notifications V1, original_transaction_id which is associated to web_order_line_item_id of the re-purchased subscription period has changed back to the original one (the one which was generated at first purchase) in latest_receipt_info. When we call verifyReceipt with the receipt obtained from appStoreReceiptURL, the response does not seem to contain new original_transaction_id which was generated at re-purchase We have some questions regarding this original_transaction_id behavior. When a user re-purchase the same subscription product which was canceled and expired some time ago, it seems that new original_transaction_id is generated. Is this an expected behavior? If yes, it seems that, at some point, original_transaction_id which is associated to web_order_line_item_id of the re-purchased subscription changed back to the original original_transaction_id which had been generated at first purchase. Is this an expected behavior? What triggers the original_transaction_id change to the original one? Is it related to some user actions or subscription status change?