each_connected and get_template_part

I have code that works in a single file (archive.php) but loses the connection data if I split it the loop out into a loop.php file and call it with get_template_part (‘loop’)

How do I avoid losing the connections when using a template part?

In more detail, here is what i’m doing:
I use this custom query

$args = array(
	'post_type' => $post_type_name,
	'post_parent' => 0,
	'orderby' => 'title', 'order' => 'ASC'
	);

$wp_query = new WP_Query( $args );

and set up a bunch of connections like this

global $wp_query;
p2p_type( 'people_to_places' )->each_connected( $wp_query, array(), 'place_people' );

Then call them in the loop like this like this:

<div class="place-link place-narrow" >
	<?php
	echo '<strong>Related:</strong> ';
        foreach ( $post->place_people as $post ) : setup_postdata( $post );
	        the_title();
	endforeach;
	wp_reset_postdata(); // set $post back to original post
	?>
</div>

It all works fine if I have all the code in a single file, but when I put that last bit in loop.php and call it with get_template_part, the connections are empty.

http://wordpress.org/extend/plugins/posts-to-posts/