original_transaction_id sometimes changes in sandbox

When I test my iOS subscription purchases in the sandbox environment, sometimes the original_transaction_id returned by receipt verification changes (gets incremented by 1 to be precise) when I receive the corresponding server-to-server notification. Very rarely this would happen in the production environment as well but lately I notice this more often in sandbox. Anybody else experiencing this?

Replies

If you can reproduce or have examples, can you provide the details in a feedback assistant ticket and provide the FB# filed? example receipt, notifications and sandbox Apple ID would be great.

Thanks. I've filed a ticket FB11989240 with a sample from our sandbox environment.