Hello!
I’m sorry for late reply.
Please try to add this script to any js file (for example file of your theme) that is processed on the page with sliders.
jQuery(document).ready(function() {
jQuery('.thumbs li').each(function() {
var wraper = jQuery(this).parents('.bx-wrapper');
jQuery(this).width(wraper.width() / wraper.find('li').length);
});
});
If you will have any problems with it – just let us know.