WhatsApp Status Webhooks Can Arrive Out of Order, Breaking Delivery Data

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Each outgoing WhatsApp message triggers sent, delivered, read, or failed webhooks, and storing only the most recently received one can corrupt message data. A read message may revert to delivered, or a failure may be overwritten by a late sent status. Statuses can also arrive before the message is saved, causing them to be lost. The article recommends treating delivery as a forward-only state, recording each status's timestamp separately, and holding early-arriving statuses. These precautions are needed because Meta's documentation does not guarantee ordering, may send duplicates through retries, and can skip the delivered webhook when a message is read immediately.

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