Hi there,
We’re using APNs Push delivery metrics, which provide a breakdown including metrics like Received by APNs, Delivered to Device, and Discarded - Token Unregistered.
To track unregistered tokens on our end, we also monitor the 410 error responses from APNs, which typically indicate that a token is no longer valid. However, we’ve noticed a discrepancy: the number of 410 errors we receive is much lower than the Discarded - Token Unregistered count shown in the APNs console.
Is this difference expected? Specifically, does APNs sometimes know that a token is unregistered but still return a success status to us when we attempt to send a push to that token?
Thank you for any insights you can provide!