I received the following validated receipt JSON (scrubbed of identifying and unimportant data) which clearly indicates a subscription upgrade. Upon purchasing the upgrade, the active subscription appears to have been cancelled. My sandbox receipts do not behave this way though, so I'm wondering if this a difference between enviornments, or if something else caused this situation and the active subscription cannot be relied upon to acquire a cancellation_date upon upgrade.The first purchase is a 'basic.monthly' subscription. The second is a renewal of 'basic.monthly', but 9 days into the subscription, a 'premium.monthly' subscription is started, and the second 'basic.monthly' is cancelled (2 seconds after 'premium.monthly' is purchased).Thoughts?{ "status": 0, "environment": "Production", "receipt": { "receipt_type": "Production", "adam_id": 1, "app_item_id": 1, "bundle_id": "com.mycompany.myapp", "application_version": "1.0", "download_id": 1, "version_external_identifier": 1, "receipt_creation_date": "2017-11-16 21:21:00 Etc/GMT", "request_date": "2018-02-05 23:04:17 Etc/GMT", "original_purchase_date": "2017-03-09 19:28:19 Etc/GMT", "original_application_version": "1", "in_app": [...] }, "latest_receipt_info": [ { "quantity": "1", "product_id": "com.mycompany.myapp.basic.monthly", "transaction_id": "xxxxxxxxxx4808", "original_transaction_id": "xxxxxxxxxx4808", "purchase_date": "2017-03-14 01:48:41 Etc/GMT", "original_purchase_date": "2017-03-14 01:48:41 Etc/GMT", "expires_date": "2017-04-14 01:48:41 Etc/GMT", "web_order_line_item_id": "xxxxxxxxxx9117", }, { "quantity": "1", "product_id": "com.mycompany.myapp.basic.monthly", "transaction_id": "xxxxxxxxxx4186", "original_transaction_id": "xxxxxxxxxx4808", "purchase_date": "2017-04-14 01:48:41 Etc/GMT", "original_purchase_date": "2017-03-14 01:48:41 Etc/GMT", "expires_date": "2017-05-14 01:48:41 Etc/GMT", "web_order_line_item_id": "xxxxxxxxxx9118", "cancellation_date": "2017-04-23 14:23:42 Etc/GMT", "cancellation_reason": "0" }, { "quantity": "1", "product_id": "com.mycompany.myapp.premium.monthly", "transaction_id": "xxxxxxxxxx5089", "original_transaction_id": "xxxxxxxxxx4808", "purchase_date": "2017-04-23 14:23:40 Etc/GMT", "original_purchase_date": "2017-03-14 01:48:41 Etc/GMT", "expires_date": "2017-05-23 14:23:40 Etc/GMT", "web_order_line_item_id": "xxxxxxxxxx9235", },... ]}