Worked on the jellyfin/jellyfin-web repository to enhance playback user experience by addressing a UI issue where the loading spinner persisted after the playback modal was closed. Focused on front-end development using JavaScript, the solution involved precise state management to ensure UI elements were properly hidden, reducing visual clutter and improving perceived responsiveness during modal interactions. The fix was implemented with a minimal code footprint and validated through partner QA, emphasizing low-risk deployment and regression prevention. This work demonstrated attention to detail in debugging and performance, contributing to a smoother user interface and more reliable modal behavior for Jellyfin Web users.