Ionic Cordova camera black screen

Our app is used ionic and cordova camera plugin. Sometimes the camera screen will become black screen. After shutdown the app , the camera screen will recover to normal. And this problem is not always occurred. It only occurred on some devices in sometime.
The run-time environment of our app are below:

  1. OS : iOS 10.2 ;
    2.Ionic : 1.3.2 ;
  2. Cordova-iOS: 4.3.1;
    Could you tell us what’s the possible reasons for this black screen issue.

@Albatross76 have you got solution for this problem ??