Instagram Image URLs (lookaside.fbsbx.com) not triggering External Request webhook

Hi,
I have a critical issue with External Requests.

When a user sends an Instagram image, the URL looks like this:

https://lookaside.fbsbx.com/ig_messaging_cdn/?asset_id=...

This URL is passed in the payload, but the webhook in n8n never triggers.

• Test webhook calls from ManyChat work fine

• Text-only messages also work

• Problem only occurs when the payload contains lookaside.fbsbx.com image URLs

Has anyone experienced this before? How can we make sure the webhook is triggered with Instagram image URLs?

Thanks in advance!