Worked on the istio/istio repository to address a bug related to ServiceEntries named port resolution, focusing on improving the reliability of service mesh port mappings. The solution involved updating the backend logic in Go to ensure that named ports are correctly resolved when the targetPort is not explicitly specified, aligning the behavior in ambient mode with that of sidecars. Additional regression tests were implemented to validate the fix and maintain consistency across different configurations. This work reduced the risk of misrouting and runtime errors for users relying on named ports in Kubernetes environments, contributing to more stable cross-environment deployments.