holgerD-8

if ( $this->is_valid ) {
    if ( $this->is_update && $this->term_id ) {
        $new_term = wp_update_term( $this->term_id, $this->taxonomy, $this->wp_new_term_args );
    } else {
        $new_term = wp_insert_term( $this->wp_new_term_args['name'], $this->taxonomy, $this->wp_new_term_args );
    }
}

remove_filter( 'term_description', 'wp_kses_data' );
remove_filter( 'pre_term_description', 'wp_filter_kses' );
add_filter( 'term_description', 'wp_kses_post' );
add_filter( 'pre_term_description', 'wp_filter_post_kses' );
 
if ( $this->is_valid ) {
    if ( $this->is_update && $this->term_id ) {
        $new_term = wp_update_term( $this->term_id, $this->taxonomy, $this->wp_new_term_args );
    } else {
        $new_term = wp_insert_term( $this->wp_new_term_args['name'], $this->taxonomy, $this->wp_new_term_args );
    }
}