Added .html to Woocommerce permalink but pagination don't work!

I'm recently added this code to my Wordpress website to add .html for my product category. It worked okay with the category (http://mywebsite.com/parent-category/product-category.html) but when I clicked the pagination, the link turned into (http://mywebsite.com/parent-category/product-category.html/page/2)

This is a code that i added to function.php on my site

function wpse_178112_category_permastruct_html( $taxonomy, $object_type, $args ) {
if ( $taxonomy === 'product_cat' )
    add_permastruct( $taxonomy, "{$args['rewrite']['slug']}/%$taxonomy%.html", $args['rewrite'] );
}

add_action( 'registered_taxonomy', 'wpse_178112_category_permastruct_html', 10, 3 );

Please help, I'm just a Wordpress newbie .

Thank you!!!!!!!!!!