I stripped my app to a basic app. Just to show the problem. I tried to creat a codepen. But my code did not work. Maybe because I not have experience with codepen. Here is a link to te pen:
See the Pen rBFCw2 by Piet Crombach (@pcrombach) on CodePen.
I was checking out your codepen and was getting a crazy amount of errors in the console. So much that the entire project wouldn’t start, just a heads up