Always fold open in editor

Hi @basvweb. What eCommerce plugin are you using? I recommend asking in their support forum so the plugin’s developers and support community can help you with this.

Here is the forum for WooCommerce: https://www.ads-software.com/support/plugin/woocommerce/

Try to add this to your active theme functions.php (or better with a snippets plugin):

function my_open_short_description(){
    ?>
    <script type="text/javascript">
        (function($){
            $("#postexcerpt").removeClass("closed");
        })(jQuery);
    </script>
    <?php
}

add_action( 'admin_footer', 'my_open_short_description', 10, 1 );

This works perfectly, thank you @sync4489 !