It used to be that pressing the back button while in the settings menu would take you back to where you were before. For the last several versions, it would instead unceremoniously exit the app. I see from the notes for 271 that an exit prompt has been added, seemingly cementing what I would have considered the root bug. (i.e. that it exits at all rather than just going back)

So how are we supposed to leave the settings menu if not the back button?