Next post loads fine but then falls apart

Hi – Great work on this plug-in. I’m having a weird issue where no matter what I do, the next post loads great under the first post. The URL changes and everything is fine. But scroll down some more and the whole thing goes nuts… I get four more posts and then a mix of post summairies and excerpts…

I’m using a theme from ThemeMeme called Cassie, which i know is not a supported theme. Here is the theme link: https://www.themememe.com/cassie

Thanks for any thoughts in advance

Also, here is my content-partial.php:

<?php
/**
 * This file loads the content partially.
 */

$remove_comments = get_option( 'auto_load_next_post_remove_comments' );

// Load content before the loop.
do_action( 'alnp_load_before_loop' );

// Check that there are more posts to load.
while ( have_posts() ) : the_post();

	$post_format = get_post_format(); // Post Format e.g. video
	if ( false === $post_format ) {
		$post_format = 'standard';
	}

	// Load content before the post content.
	do_action( 'alnp_load_before_content' );

	// Load content before the post content for a specific post format.
	do_action( 'alnp_load_before_content_type_' . $post_format );

	// Include the content
	get_template_part( 'content-single', get_post_format() );

	// If comments are open or we have at least one comment, load up the comment template.
	if ( comments_open() || get_comments_number() ) :
		if ( $remove_comments != 'yes' ) { comments_template(); }
	endif;

// End the loop.
endwhile;

https://www.ads-software.com/plugins/auto-load-next-post/