Found an issue if any other users using UserPro and Piklist frontend forms.
When using repeatable fields on the frontend, there is script in UserPro that prevents the [-][+] buttons from working.
A quick fix that worked for me was the following:
jQuery(document).on('click', "*[class^='popup-'], a[href='#']", function(e){
e.preventDefault();
//return false;
});
Path: /wp-content/plugins/userpro/scripts/scripts.min.js
Line: 1026
Comment out: “return false” and it will work again