interval is not working after adding images

I added the image_carousel like mentioned in the stackoverflow post here with a List.

If I reconstruct the Widget with a new List the carousel is not going through all Images. Only the images were in the List before.
How can force the carousel to show also the added images?

`import 'package:flutter/material.dart';

import 'package:image_carousel/image_carousel.dart';

class ShowPictures extends StatelessWidget {
final List networkimages;

//Constructor to create this class
ShowPictures(this.networkimages) {
print('Image Carousel Widget Constructor');
}

@OverRide
Widget build(BuildContext context) {
// TODO: implement build
print('Image Carousel Widget build');
return new ImageCarousel(
networkimages,
interval: new Duration(seconds: 8),
);
}
}
`

if i scroll manually through the pictures the Widget is showing all pictures from the list.