If you have one of Samsung's devices that were released in the past couple of years, chances are it either has had this annoying behavior since the start (Galaxy S7 / S7 edge) or it was introduced with some update (Note 4). What's the annoying behavior? When you get the dialog to choose a default app to open a certain file or link or handle a certain action, you don't get any chance to make a temporary choice for once. Whatever app you tapped would be set as default. And that meant that the only way to remove the default was to go into the app's settings and clear the defaults.