Red end call button not displaying
50% of the time when I ask Siri to call someone, the call goes through and when the call is finished and I lower the phone from my ear the red end call button does not display. To end the call necessitates logging on to the phone, pushing the green bar at the top of the screen, then the call can be stopped. Pushing the side button (iPhone 6S, newest IOS) does not work either.
iPhone 6s, iOS 10.3.1, red stop call button