Neo internal email system allows files to be attached from a variety of sources, including Microsoft Word. When a Word document is opened from within the Staff App that is docked on a mobile device's Home Screen (i.e. how it is typically accessed), it opens in such a way that navigation back to the app is impossible. It will look similar to the image below.

This may be fixed in iOS in the future, but as of this writing, the only solution is to close the app and reopen it.

If this is a common problem for you, it works as expected by navigating to the site directly at mobile.kbhmaine.org.