There are times that it just goes back to the home screen of the device, usually if going through different story info links. Usually doesnt happen in the middle of a story, but sometimes does. Other than that there are a plethora of stories written by all kinds of authors. It would be nice if it puts a notice of incomplete and abandoned, but all that is there is a last day updated. As the saying goes YMMV, however, it is pretty good.
07/24/2017 updated
You need patience with this app. When it works, it works well. Way way too many times the app freezes up. Wattpad seems to be aware of the issue however it has yet to provide a working solution. This is mainly on iOS devices
Seeker1107 about Wattpad - Free Books and eBook Reader, v6.38.0