sub wp query – error with Memberpress

Having trouble with this plugin and Memberpress. Memberpress sent me this email:

Hi Steve,

Most likely the plugin is doing its own sub wp query, which causes a known bug with WordPress filters. Unfortunately the bug has been known about for 5 years by the WordPress developers but has yet to be addressed. You can read up on it here: https://core.trac.wordpress.org/ticket/17817

The easiest work-around that I know of, which you can run by the authors of this recent posts plugin if you’d like, is to do something like this with the $wp_filter global. This should hopefully give them enough to work around this issue until WP gets around to implementing a proper fix.

function my_shortcode_callback($atts, $content = '') {
    global $post;
    global $wp_filter;

    $original_filter = $wp_filter;
    $args            = array(//SOME ARGS HERE//);
    $original_post   = $post;
    $wp_query        = new WP_Query($args);

    ob_start();

    while($wp_query->have_posts()) {
      $wp_query->the_post();

      //Avoid infinite loop
      if($original_post->ID === $post->ID) {
        continue;
      }

      the_content();
    }

    // Reset the global query.
    wp_reset_query();
    wp_reset_postdata();

    $wp_filter = $original_filter; //Reset $wp_filter global to the way it was before we ran the sub-query

    return ob_get_clean();
}
add_shortcode('some-custom-loop', 'my_shortcode_callback');

https://wordpress.org/plugins/recent-posts-widget-extended/