Architect IVR throwing 504 on Express webhook after third selection

Problem
The Architect IVR flow won’t connect to our Express webhook. GC version sits at 2024-2.234.1. The Node handler responds in under 200ms, but the flow throws a 504 right at the HTTP Request step. Logs show the payload hits the middleware fine. JWT validation passes. The timeout only triggers after the third menu selection.

{"status": 504, "flow_step": "http_request_3"}

Console is totally empty. Doing jack all on the debug side. It’s hanging on the second node.