This has happened to me on occasion. I typically hard reset my iPhone and once the phone restarts, the new icon you changed it to should appear. If it doesn't, just go back into the app and change the icon and it should work.
This has happened to me on occasion. I typically hard reset my iPhone and once the phone restarts, the new icon you changed it to should appear. If it doesn't, just go back into the app and change the icon and it should work.