Theme breaks views exposed filters ajax

Here is a workaround copied from the Barrio theme.

in sub_theme.info.yml add the following:

libraries-extend:
  views/views.ajax:
    - sub_theme/views.ajax

in sub_theme.libraries.yml add the following:

views.ajax:
  js:
    src/js/modules/views/ajax_view.js: {}

in your sub_theme create a file src/js/modules/views/ajax_view.js with the following:

/**
 * @file
 * Extends core ajax_view.js.
 */

(function ($, Drupal) {
  'use strict';
  /**
   * @method
   */
  Drupal.views.ajaxView.prototype.attachExposedFormAjax = function () {
    var that = this;
    this.exposedFormAjax = [];
    $('button[type=submit], input[type=submit], input[type=image]', this.$exposed_form).not('[data-drupal-selector=edit-reset]').each(function (index) {
      var self_settings = $.extend({}, that.element_settings, {
       base: $(this).attr('id'),
        element: this
      });
      that.exposedFormAjax[index] = Drupal.ajax(self_settings);
    });
  };

})(jQuery, Drupal);