Worked on the envoyproxy/envoy repository to address a reliability issue in the on-demand cluster discovery flow. Implemented a bug fix in C++ that refreshes cached route cluster information after successful discovery, ensuring downstream HTTP filters always access current cluster data. Enhanced the solution with comprehensive integration testing to verify that cluster information is correctly updated post-discovery, and documented the changes in the release notes. This work focused on improving cache invalidation and dynamic routing stability, reducing runtime inconsistencies and debugging time. Emphasized robust integration testing, HTTP protocol handling, and networking to deliver safer, more reliable deployments for dynamic routing scenarios.