Autosave should apply to the Kaban Board when working in the 'expand' mode

This has happened a few times to me: If I’m adding notes in the expanded mode and I need to check another tab in my browser, everything I entered in the expanded window is lost unless I remember to close the expanded window first, before skipping tabs; and I never remember to do that. Usually, if I skip to another tab in other applications, like writing an email, when I return it’s there as it was when I left.