Quality Management webhook integration failing with 400 Bad Request

Stumbled on a weird bug today with the Quality Management webhook integration. The payload sent to ServiceNow via Data Action is failing consistently with a 400 Bad Request error on the incident table API endpoint.

The JSON structure matches the schema exactly, yet the ServiceNow REST API rejects the request. This happens specifically when the evaluation status changes to ‘complete’ in the Architect flow.

Has anyone seen this specific failure mode with WFM data actions? The logs show the payload is valid before transmission.