Use custom jQuery toggle functionality in Drupal 7 to prevent multiple triggered elements, because of updated DOM

drupal-ajax-accordion.js

(function ($) {
  Drupal.behaviors.accordion = {
    attach: function (context, settings) {
      $('.accordion h3.title').once('accordion', function () {
        $('.accordion h3.title').toggle(function () {
          // Actions here
        }, function () {
          // Actions here
        });
      });
    }
  };
})(jQuery);