WhatsApp audio messages arriving without attachments data in Conversation Parts

When fetching conversations via the Conversations API (GET /conversations/{id}), I’ve noticed a difference between WhatsApp images and WhatsApp audio messages.

• Image messages include full attachments data (URL, content_type, filesize, etc.).

• Audio messages, however, show attachments: [], even though the Intercom Inbox UI displays an audio clip. The only extra field is external_id with a WhatsApp wamid, but no file URL or metadata.

Example audio part:

{ "part_type": "comment", "body": "<p>Sent an audio clip</p>", "attachments": [], "external_id": "whatsapp:wamid...." }

How can this be resolved?