Typeahead only making one request

With the code below, an ajax request to the server will only be made once after the first letter of the first query after a page load.

So if i type product name into the input, the request will be /default.aspx?q=p&serveas=ajax and then no more requests will fire until I reload the page, no matter what I type into the input.

If I copy-paste a word that I know hits I will get a response, but again, only one and only once.

If I console.log on the onResult() callback I can see it is registering the query in the input correctly, it's just not making a request for a result.

I have to parse the Ajax result from HTML to an object because my host can't return JSON search results.

The debug output says everything is normal.

var parseResult = function (data) {

  var arr = [];

  $(data).find('.products').find('.item').each(function(i) {
    var item = $(this);
    arr.push({
      sku: item.prop('id').replace('catalogue-',''),
      name: item.find('.item_name').text(),
      image: item.find('.listing_thumb').find('img').prop('src'),
      url: item.find('a').eq(0).prop('href')
    });
  });

  return arr;

};

searchField.typeahead({

  delay: 300,
  display: ['sku','name'],
  order: "asc",
  minLength: 3,
  maxItem: 15,
  highlight: true,
  filter: false,

  template: "<a href='{{url}}'><img style='max-width:60px;' src='{{image}}'> {{name}} <small style='color:#999;'>{{sku}}</small></a>",
  emptyTemplate: 'No result for "{{query}}"',
  source: {
    items: {
      ajax: {
        type: 'GET',
        url: '/default.aspx',
        data: {
          q: '{{query}}',
          serveas: 'ajax'
        },
        dataType: 'text',

        callback: {
          done: parseResult
        }
      }
    }
  },

  debug: true
});