Folders not working properly in Nueva

I'm thinking about switching template to Nueva. 
Currently I'm going through the Preview and making sure everything is working properly. But there is one issue. In my main navigation I have two folders. On the home page they work as they should. But on every other page the folders don't expand the drop down. Clicking takes me to the first page in the folder, there is no way to go to the others.

Any one familiar with this?

I can't find this problem on Nueva template: https://nueva-demo.squarespace.com/

so you need to set it live on your site then share url, we can check easier

Or you can duplicate the site, set Nueva template then share its url, we can help easier