QML Camera external trigger event is not getting when unplug and again plug the camera

[dhu0504]

I am using Camera qml application. In qml i am writing the below code to get the external trigger key from the camera as follows
Keys.onReleased: {
console.log("event.key......................."+event.key)
if(event.key === Qt.Key_WebCam){
console.log("key onreleased: Qt.Key_WebCam")
event.accepted = true
}

}

First time i am getting the event. But once unplug again plug the camera the camera key event is not captured.

It will be very helpful any one give the solution.

Thanks in advance