During this period, work centered on developing a feature for the apache/kafka repository to enhance the MockConsumer component. The developer implemented partition loss simulation support, enabling more realistic testing of scenarios where partitions are lost due to session timeouts or heartbeat failures. This involved adding onPartitionsLost handling to simulate non-graceful partition loss during rebalances, updating related tests, and documenting the testing strategy to standardize usage across teams. The approach focused on improving consumer robustness under adverse network or partition conditions, utilizing Java, Kafka, and unit testing to ensure traceability to KAFKA-20575 and resilience in consumer behavior.