You can’t avoid that with the indicator either. Closing windows by accident or due to a crash happens. Consider using window.onclose and saving to local storage

You can’t avoid that with the indicator either. Closing windows by accident or due to a crash happens. Consider using window.onclose and saving to local storage to avoid data loss. That said, you could use a separate mode for users with bad network. That mode may require more changing and distracting UI elements. I am not prepared to say whether it is a good solution though.