Webhook stopped working

Hi,

Webhook is not working in the sense that nothing hits my endpoint when an SMS comes in, but when i subscribe, it does send the validation token (so I know the end point is reachable). It was working perfectly fine and then just stopped, I have deleted the subscription and resubscribed.

Any help would be appreciated!

Endpoint:

@app.route('/webhook/ringcentral', methods=['POST'])
def ringcentral_webhook():
    try:
        validation_token = request.headers.get('Validation-Token')
        
        if validation_token:
            return make_response('', 200, {'Validation-Token': validation_token})
        
        data = request.get_json(silent=True)
        logging.info(data)
        if data:
            sender = data.get('body', {}).get('from', {})
            phone_number = sender.get('phoneNumber', 'Unknown Number')
            sender_name = sender.get('name', {phone_number})
            message_subject = data.get('body', {}).get('subject', 'No subject')
            
            text = f"New SMS from: {sender_name}. Message: {message_subject}."
            slack.slack_sender(text)
            
            logging.info(data)
            return jsonify({'status': 'success'}), 200
        else:
            logging.info("No JSON payload received.")
            return jsonify({'status': 'error', 'message': 'No JSON payload'}), 400
    except Exception as e:
        logging.error(f"Error processing the webhook data: {e}")
        return jsonify({'status': 'error', 'message': str(e)}), 500

the subscribe code:

    def clear_webhook_subscriptions(func):
        def wrapper(self, *args, **kwargs):
            self.read_subscriptions()
            return func(self, *args, **kwargs)
        return wrapper

    @clear_webhook_subscriptions
    def subscribe_for_notification(self, event_filters=['/restapi/v1.0/account/~/extension/~/message-store/instant?type=SMS'], delivery_address = 'REDACTED'):
        try:
            body_params = {
                'eventFilters': event_filters,
                'deliveryMode': {
                    'transportType': 'WebHook',
                    'address': delivery_address + '/webhook/ringcentral'
                },
                'expiresIn': 604800 #TODO:Rework this. can be upto 10 yrs. 315360000
            }
            endpoint = "/restapi/v1.0/subscription"
            resp = self.post(endpoint, json=body_params)
            resp.raise_for_status()

            response = resp.json()
            logging.info(f"Subscription ID: {response['id']}")
            logging.info("Ready to receive incoming SMS via WebHook.")
            return response
        except HTTPError as http_err:
            logging.error(f"HTTP error occurred: {http_err}")
        except Exception as err:
            logging.error(f"An exception occurred: {err}")

    def read_subscriptions(self):
        try:
            endpoint = "/restapi/v1.0/subscription"
            resp = self.get(endpoint)
            response = resp.json()
            if not response['records']:
                logging.info("No subscription found.")
            else:
                for record in response['records']:
                    logging.info(json.dumps(record, indent=2, sort_keys=True))
                    self.delete_subscription(record['id'])
        except Exception as e:
            logging.error(f"An exception occurred while reading subscriptions: {e}")

    def delete_subscription(self, subscription_id):
        try:
            endpoint = f"/restapi/v1.0/subscription/{subscription_id}"
            self.delete(endpoint)
            logging.info(f"Subscription {subscription_id} deleted.")
        except Exception as e:
            logging.error(f"An exception occurred while deleting subscription {subscription_id}: {e}")