During September 2025, Eryk Kruczek focused on enhancing the stability of the aws/serverless-java-container repository by addressing a critical issue in HTTP response handling. He identified and fixed a bug where headers with null values were incorrectly included in responses, which could lead to malformed data reaching clients and downstream services. Using Java and leveraging his expertise in API and backend development, Eryk implemented logic to exclude these invalid headers and added a regression test to ensure ongoing reliability. This targeted work improved the robustness of serverless deployments and reduced the risk of customer incidents related to improper HTTP header propagation.