Playlists disappear usually when the IPTV app does not save credentials locally, the playlist URL expired, the app cache is corrupted, or the provider rotates tokens frequently. Switch to Xtream Codes login instead of raw M3U, clear app cache, update the app, or enable “persistent login” if available. Some Smart TVs limit storage, causing the app to lose saved settings. Glanfy recommends modern IPTV players with reliable database-based storage.