Cant't see post in the co-author archive page

I do not understand… Its the third time I am writing this and every time I come back I do not find my post.

There’s someone that is deleting it?

Anyway I would like to know if there is a bugfix about this problem or if (and where) is possible to download a previous version of the plugin in order to downgrade the new functionality and get the plugin to work as it used to be.

I would love to resolve this problem by code, I am using the same structure and functionality as the previous versions and it does not look that anything has changed` since then.

For the record I’ll add the code I am usign in the author.php page:

$args = array(
  'author' => $author_id,
  'post__not_in' => get_option( 'sticky_posts' ),
  'posts_per_page' => 15,
  'paged' => $paged,
);
query_posts( $args );

The $author_id variable is set by get_query_var('author') but in the list I do not find the articles where the current author is the co-author of the article…

Where is the problem?

https://wordpress.org/plugins/co-authors-plus/