Worked on improving IP Address Management (IPAM) stability in the derailed/cilium repository, focusing on resolving a race condition during IP release. Addressed a scenario where an IP could be reassigned while still being released by ensuring proper removal from release status maps before returning it to the pool. Enhanced concurrency handling across allocation and release paths to reduce the risk of IP misallocation, particularly under high churn in multi-tenant Kubernetes environments. Added targeted test coverage to validate the reassignment scenario, leveraging Go for both implementation and testing. The work improved network reliability and operational risk management through robust IPAM logic.