Event.SUSPEND - IOS

Ios 9.x

Adobe Air 21.x

Flash CC

In ios Event.SUSPEND is never called, does not work. My code:

NativeApplication.nativeApplication.executeInBackground = true;
NativeApplication.nativeApplication.addEventListener(Event.SUSPEND, onSUSPENDApp);
function onSUSPENDApp(event:Event):void
{
   trace ("**********************onSUSPENDApp");
   ...
   ...   
 }