Missing Description and Instructions fields

[bluantinoo]

It would be nice to have the description and the instructions fields for each payment method to present relevant info to customers on the checkout and thank you page.

I've tried to add the description on plugin method settings here https://github.com/degica/komoju-woocommerce/blob/master/includes/gateway-settings-komoju.php

fields shows up in backend method settings, but result as empty on frontend.

Even using a WC filter, like the following shows just an empty string on frontend where description should be shown:

add_filter( 'woocommerce_gateway_description', 'iic_komoju_payment_method_description', 25, 2 );

function iic_komoju_payment_method_description( $description, $gateway_id ) {

   if( 'komoju_credit_card' === $gateway_id ) {
      $description = '<p>komoku credit card</p>';
   }

   return $description;
}

not sure why