During November 2025, Abhishek contributed to the istio/istio repository by addressing a critical stability issue in Istio Gateway. He implemented a backend fix in Go to enforce namespace-scoped uniqueness for ListenerSets, resolving configuration collisions that previously occurred when ListenerSets shared names across namespaces. This change improved multi-tenant isolation and reduced the risk of misrouting in Kubernetes environments. Abhishek expanded regression test coverage, updated golden files to lock in the corrected behavior, and documented the changes to align with production standards. His work focused on backend development, leveraging expertise in Istio and Kubernetes to enhance gateway reliability and maintainability.