Pierre Lehnen worked on the RocketChat/Rocket.Chat repository, focusing on backend development and configuration management using TypeScript. During the month, he delivered a targeted fix for a VoIP regression by correcting the default SIP port from 5080 to 5060, ensuring consistent configuration across both the settings definition and the media call service. This change addressed misrouted calls and improved the reliability of VoIP collaboration features for end users. Pierre’s approach demonstrated careful regression debugging and cross-component consistency, reducing the risk of future misconfiguration and support incidents while maintaining a clear, traceable code path for ongoing maintenance.