“Next page”-problem with search results

The search function for my wp-site works great for the first result page. Example:
https://chic.se/?s=plagg

At the bottom of that page there is a “next-page”-link, pointing to url https://chic.se/page/2/?s=plagg (using <?php posts_nav_link(‘ — ‘, __(‘« Previous Page’), __(‘Next Page »’)); ?> in the search.php template)

Now the problem, if i click the next-page-link (https://chic.se/page/2/?s=plagg) the firstpage of the blogg is displayed, no redirect or anything. What’s going on here?