Screen Recording Webhook 502 Bad Gateway to ServiceNow

Anyone free to help troubleshoot this 502 Bad Gateway when pushing screen recording metadata to ServiceNow. The Architect flow triggers the Data Action, but the webhook to /api/now/table/x_custom_rec fails intermittently. v2024.1 environment. Payload contains recording_url and agent_id. ServiceNow logs show the request never arrives. Checking GC audit logs reveals the outbound request succeeds, suggesting a network hop issue. Any insights?