Not receiving SMS in production

Howdy,

I've created a webhook subscription to receiving SMS data in a production app. Here is a sample of the subscription deets I get when calling "getSubscriptions()":

{
    "uri": "https://platform.ringcentral.com/restapi/v1.0/subscription/<SUB_ID>",
    "id": "<ID>",
    "creationTime": "2024-01-25T22:12:37.662Z",
    "status": "Active",
    "eventFilters": [
        "/restapi/v1.0/account/<ID>/extension/<ID>/message-store/instant?type=SMS"
    ],
    "expirationTime": "2034-01-22T22:12:37.662Z",
    "expiresIn": 315028802,
    "deliveryMode": {
        "address": "<PUBLIC_URL_ADDRESS>",
        "transportType": "WebHook",
        "encryption": false
   }
}

When I log the raw incoming request data I am seeing nothing come through. I also have a telephony webhook subscription setup that is receiving data just fine and there are no issues or errors while creating either webhook. Both are visible in production and have the "Active" status.

I also see in realtime plenty of data in the production SMS log. What might be missing here and/or what is a good way to debug from here? Really appreciate and support and the community forum in general!