Once you log out, it is not easy to close the app without going through several steps. It seems like the app disables the display of the back, clear, and app switching buttons. In the grand scheme if things, this is not a show stopper, but is a bit of an annoyance and inconvenience, we are all aware of how sorry companies are for causing annoyance. On another note, the "new" app looks almost exactly the same as the browser-based website. Why do we need to have a separate app just for WF?