In May 2025, Vlad focused on enhancing the reliability of pinned messages within the GetStream/stream-chat-flutter repository. He addressed a persistent issue where duplicate pinned messages appeared in the channel state by refactoring the update logic to ensure each message was added to the pinned list only once and accurately reflected its current pin status. Working primarily with Dart and leveraging his expertise in Flutter and mobile development, Vlad’s changes improved state management and testability for pinned message logic. This targeted bug fix reduced display inconsistencies, minimized edge-case errors, and contributed to a smoother, more trustworthy chat experience for end users.