During March 2025, Alvin Chan focused on improving device event handling in the isaac-sim/IsaacLab repository by addressing a bug in the gamepad subscription API for SE2 and SE3 devices. He identified and corrected an incorrect Omniverse API call used for unsubscribing from gamepad events, updating the unsubscribe method name to prevent stale subscriptions. This targeted fix enhanced the reliability of device management and improved the developer experience when integrating APIs. Working primarily with Python, Alvin demonstrated attention to detail in bug resolution, though his contributions during this period were limited to maintenance rather than new feature development or broader architectural changes.