04-19-2020, 04:10 PM
Did the app get suspended and restarted by windows? If so, that would do it, as the checkmark state isn't saved in the suspended state. You can avoid this by running the app in windowed mode instead of in full screen mode (hit F11 to exit fullscreen mode). In Windowed mode, Windows won't suspend MobileSheets so you can alt-tab without any issues. I'm sorry you lost all that time though.
Mike
Mike