Twilio - WhatsApp - automatic "Accepted" message

I have a WhatsApp sender in Twilio. Inbound messages are sent to my Make scenario via webhook.

Upon receiving a new message, an automatic message of “Accepted” is sent back to the original message sender in WhatsApp, and the remainder of the make scenario works appropriately. I want this “Accepted” message to stop.

Twilio support suggests that it must be coming from the Make webhook. When I delete the webhook from twilio, no “Accepted” message is sent. And when I keep the webhook in Twilio, but disable the Make scenario, no “Accepted” message is sent. So I do believe the issue is somewhere in the Make webhook.

I have other Scenarios that are linked to Twilio via unique webhook, and none of them have this issue, though none of them involve WhatsApp.