Worked on enhancing the stability and reliability of the chat endpoint in the open-webui/open-webui repository by addressing a critical bug in the MCP client cleanup process. Refactored the asynchronous cleanup logic using Python, focusing on backend development and robust error handling. The solution removed fragile async wrappers and replaced problematic usage of asyncio.wait_for and asyncio.shield, which previously violated anyio cancel-scope rules and led to 500 Internal Server Errors. By ensuring direct and orderly disconnection of MCP clients, the changes improved chat interaction reliability, reduced support incidents, and established a cleaner, more maintainable async pattern for future backend enhancements.