wp_nav_menu() exhibiting record in a distinct Place?

Whereas making an attempt so as to add menu record as the next

<li>
 <div class="dropdown-menu" aria-labelledby="navbarDropdown">

      <?php 
           wp_nav_menu(array(
               'theme_location' => 'header_menu_location',
               'echo' => false,
               'items_wrap' => '%3$s'
            ));

      ?>
                    
</div>

This operate ought to present an inventory of things inside div aspect however what I get is that record is being proven proper after the outer li aspect. What’s even bizarre about it’s that after I don’t use attribute ‘items_wrap’ the output is exhibiting correctly inside the div container, solely after I add to the args array the output record seems outdoors of its div container. What am I doing unsuitable?