Automatically Add Caption Shortcode to Image with Caption Field Filled In
Did a bit more digging and it appears to have been a conflict in my theme: add_filter( ‘post_thumbnail_html’, ‘remove_width_attribute’, 10 ); add_filter( ‘image_send_to_editor’, ‘remove_width_attribute’, 10 ); function remove_width_attribute( $html ) { $html = preg_replace( ‘/(width|height)=”\d*”\s/’, “”, $html ); return $html; }