为了使这一点更加完整，以下是我在评论中回答当前问题时所说的话

只是为了快速解释一下WP_Query在某些情况下会发生灾难性的失败，其中空数组被传递给它的一些参数，而不是像我们预期的那样返回空数组WP_Query返回所有帖子。至于获得正确的粘性，正如我之前所说的，您需要获得当前的类别id，并使用它来过滤粘性帖子。记住，使用这种方法时，需要从主查询中删除粘性帖子，否则会得到重复的帖子

作为一种替代解决方案，在主查询上使用挂钩和过滤器，并从similar question/answer, 这就是我想到的：（代码有很好的注释，因此可以遵循。注意：这还没有经过测试，至少需要PHP 5.4+）

function get_term_sticky_posts()
{
    // First check if we are on a category page, if not, return false
    if ( !is_category() )
        return false;

    // Secondly, check if we have stickies, return false on failure
    $stickies = get_option( \'sticky_posts\' );

    if ( !$stickies )
        return false;

    // OK, we have stickies and we are on a category page, continue to execute. Get current object (category) ID
    $current_object = get_queried_object_id();

    // Create the query to get category specific stickies, just get post ID\'s though
    $args = [
        \'nopaging\' => true,
        \'post__in\' => $stickies,
        \'cat\' => $current_object,
        \'ignore_sticky_posts\' => 1,
        \'fields\' => \'ids\'
    ];
    $q = get_posts( $args );

    return $q;
}

add_action( \'pre_get_posts\', function ( $q )
{
    if (    !is_admin() // IMPORTANT, make sure to target front end only
         && $q->is_main_query() // IMPORTANT, make sure we only target the main query
         && $q->is_category() // Only target category archives
    ) {
        // Check if our function to get term related stickies exists to avoid fatal errors
        if ( function_exists( \'get_term_sticky_posts\' ) ) {
            // check if we have stickies
            $stickies = get_term_sticky_posts();

            if ( $stickies ) {
                // Remove stickies from the main query to avoid duplicates
                $q->set( \'post__not_in\', $stickies );

                // Check that we add stickies on the first page only, remove this check if you need stickies on all paged pages
                if ( !$q->is_paged() ) {

                    // Add stickies via the the_posts filter
                    add_filter( \'the_posts\', function ( $posts ) use ( $stickies )
                    {   
                        $term_stickies = get_posts( [\'post__in\' => $stickies, \'nopaging\' => true] );

                        $posts = array_merge( $term_stickies, $posts );

                        return $posts;
                    }, 10, 1 );
                }
            }
        }
    }
});