Why does the News app lose the article you're reading when restoring This is super, super annoying.  If I open the News app on my phone, start reading an article and then, say, reply to a message; every time I restore the article the News app just goes back to the home screen. 

I'd expect this if my phone was running out of memory but it's not.

Is there anything I can do to prevent this?  Seems like a bug.
The Apple News iOS app does go back to the home screen if left inactive, I can't comment as to what triggers this and why - but I can offer a solution:

You can find the "History" of your viewed stories within the "Following" tab (bottom right).