You need to make changes to the js file. file: path/to/domain/wp-content/plugins/woocommerce-products-filter/js/front.js 1. Finde function woof_init_toggles() and comment it. 2. Then add this function after the previous comment function:

front.js

 function woof_init_toggles() {
    jQuery('body').on('click','.woof_container_inner h4', function () {        
if (jQuery(this).children().data('condition') == 'opened') {            
   jQuery(this).children().removeClass('woof_front_toggle_opened');
   jQuery(this).children().addClass('woof_front_toggle_closed');
   jQuery(this).children().data('condition', 'closed');
   if (woof_toggle_type == 'text') {
jQuery(this).children().text(woof_toggle_closed_text);
   } else {
jQuery(this).children().find('img').prop('src', woof_toggle_closed_image);
   }
} else {
   jQuery(this).children().addClass('woof_front_toggle_opened');
   jQuery(this).children().removeClass('woof_front_toggle_closed');
   jQuery(this).children().data('condition', 'opened');
   if (woof_toggle_type == 'text') {
jQuery(this).children().text(woof_toggle_opened_text);
   } else {
jQuery(this).children().find('img').prop('src', woof_toggle_opened_image);
   }
}
jQuery(this).parent().find('.woof_block_html_items').toggle(500);        
return false;
   });
}