Unable to integrate add_filter for shortcodes

Hi,
for our company it is absolutely neccessary to execute shortcodes in tag pages. We tried to add
add_filter( 'post_tag_description', 'do_shortcode' );
add_filter( 'category_description', 'do_shortcode' ); into the functions.php (certify and also spicepress) and elsewhere (tags.php and so on) but it is not working. How can we execute shortcodes in tag pages? By running the filters above the navigation is cut and we can′t see the content (body, footer). thank you