materialize css article navigation problem

I've an article that uses Documentation - Materialise form style, it works fine, but once in the device I'm not able to get the app navigation bar by tapping on the page. the only way go back to the collection is to swipe back. It only happen if I use Documentation - Materialise css and js, there must be something that gets in the way but since it is not possible to debug on the device it hard to say what.

I could even attach the article to this post, if there was a way to do it.