(DM 대응)Instagram Messaging Webhook Not Triggered by Tester DMs

[johnIT56]

Summary

Webhook test payloads from the Meta Developer Dashboard arrive correctly at my server, but real messages from tester accounts are never delivered as webhook events.

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What works

• Flask server exposed with ngrok.
• Webhook verified successfully with challenge.
• Sending test payload from Meta Dashboard → webhook handler logs the event.

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What fails

• Added an Instagram Tester account via App Roles.
• Tester accepted invitation.
• Tester DMs the connected Instagram Business account.
• No webhook event is triggered (nothing in server logs)

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Setup Details

• Instagram Business Account connected to my app.
• Access token generated via Instagram Login.
• Flask + ngrok used for webhook exposure.
• Subscribed to messages field under Instagram Webhooks.

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Observations

• Docs say:

  In development mode, webhooks are delivered only for the IG Business account and testers.

• However, even after tester acceptance, no events are fired.

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Example Logs

Test payload (works):

{"field":"messages","value":{"sender":{"id":"1234"},"recipient":{"id":"5678"},"message":{"text":"random_text"}}}

Real tester DM (fails): No event received.

Question:

Are there any hidden requirements not listed in docs

to receive tester messages in development mode?