TikTok may keep closing for several reasons, including software bugs, insufficient device memory, or an outdated app version. Clearing the app cache, updating the app, or restarting your device often helps resolve these issues. If you're looking to save your favorite content, using tools to "baixar video TikTok" (download TikTok videos) without watermarks can be a great option. Ensure your device has enough storage and is running the latest software for the best performance.