Slots functionality
 

I have designed module for my xcart 5.2.11 (http://37.48.94.34/xcart/) that adds clone slots functionality(clone selected buttons appears). But sometimes this button dont work, the page refreshes but no clone slots are performed. Who can answer why this button, that integrated to existing xcart form, sometimes performs no action?

Re: Slots functionality
 

What is the page URL? Have you managed to find when this button doesn't work?

You may try to use the "Network" tab in the Google Chrome's dev tools to check where the HTTP request goes to, what information it submits, what response it gets, and then track this logic in the PHP scripts.