Issue on version 1.7.1

First of all thank you for a great plugin. It was updated 2 months ago and still works flawlesly.

However The latest version contains a small but that mainly appears on the users page in wp-admin.
It’s visible if you use the query monitor and has something to do with the way the hooks are implemented. Obviously they do not need to fire in wp-admin. Only on the checkout page.

Here is the error:
Fatal error: Uncaught Error: call_user_func_array(): Argument #1 ($callback) must be a valid callback, class WC_Piraeusbank_Gateway does not have a method “add_woocommerce_customer_meta_fields”
in?/home/user/public_html/wp-includes/class-wp-hook.php?on line?324

Call stack:

1. WP_Hook::apply_filters()
   wp-includes/plugin.php:205
2. apply_filters()
   wp-content/plugins/woocommerce/includes/admin/class-wc-admin-profile.php:147
3. WC_Admin_Profile::get_customer_meta_fields()
   wp-content/plugins/woocommerce/includes/admin/class-wc-admin-profile.php:166
4. WC_Admin_Profile::add_customer_meta_fields()
   wp-includes/class-wp-hook.php:324
5. WP_Hook::apply_filters()
   wp-includes/class-wp-hook.php:348
6. WP_Hook::do_action()
   wp-includes/plugin.php:517
7. do_action()
   wp-admin/user-edit.php:875
8. require_once()
   wp-admin/profile.php:18

Search your installations… you know it to be true…
Is there a way to have a fix on that?