To reproduce:
- On explore feed, pull down so the loading spinner starts.
- Keep holding the finger on the screen, do not release.
- Double press the home button with other hand.
- Wait a few seconds.
- Release the finger you pulled down the feed with.
- Press back in to the Wikipedia app from the app manager.
- The page will have the spinner stuck at the top (until screen is pressed)
iPhone 6s, iOS 10.2 beta (14C89), Build 1042
(Filed on behalf of @Josve05a )