Worked on the mib1185/homeassistant-core repository to enhance the reliability of Telegram Bot media group downloads by addressing a recurring KeyError. Focused on backend development using Python, the work involved updating debug logging to safely access URL and file attributes, which improved both error handling and the visibility of debugging information. By refining how exceptions were managed and logged, the changes reduced troubleshooting time and enabled faster diagnosis of downstream failures. The approach emphasized robust error handling and effective debugging practices, contributing to a more maintainable codebase and smoother incident triage for backend processes involving Telegram Bot integrations.