Date not shown on SearchWP results pages

Hi,

Date are empty when widget is displayed on SearchWP results page.

With the help of SearchWP developer, I added this to do it works:

class hs2830_eo_compat {
  private $ran = false;
  function __construct() {
    add_action( 'searchwp_after_query_index', array( $this, 'eo_compat' ) );
    add_action( 'pre_get_posts', array( $this, 'enforce' ) );
  }
  function eo_compat() {
    $this->ran = true;
  }
  function enforce() {
    SWP()->isMainQuery = false;
  }
}
new hs2830_eo_compat();

Do you know why I need this ?
Thanks.