Ajax pagination duplicates posts on the main page, but it works correctly on all other pages, what is the reason?

Question

WordPress

I output an arbitrary type of posts using the query_posts() method. I
connect ajax pagination at the bottom, everything works both on static pages and in archives.
And on the main page it loads exactly the same records. Please tell me how can I fix it.
Code:
$args = array( 'post_type' => 'custom-type', 'posts_per_page' => 8, 'order' => 'DESC', 'page' => get_query_var('paged'), );
query_posts($args);
while ( have_posts() ) : the_post();

get_template_part( 'content-reading', get_post_format() );

endwhile;
echo ''; echo next_posts_link(__('Show more')); echo '';
wp_reset_query();