Recently, while working on a .NET-based UI application deployed with OpenResty as the HTTPS reverse proxy, I ran into a strange issue:The UI would just hang on loading , and after 90 seconds , it would reload automatically or timeout. At first glance, there was nothing obviously wrong — the backend was up, OpenResty was running, and everything seemed configured correctly. But something wasn’t right. 🔍 The Problem When I checked the browser’s network tab, requests were just stuck in the...