Required custom field of billing address issue on checkout

-- HikaShop version -- : 4.7.0
-- Joomla version -- : 3.10.2
-- PHP version -- : 7.4.26
-- Browser(s) name and version -- : Chrome 108.0.5359.125

Hello!

Recently I made custom fields for the billing address for registered users. Those only appears after login. When a new user gets to entering the address on checkout process, and clicking Next button the user got an error message: "The billing address you selected cannot be used as some information is missing. Please edit it before proceeding." This is the expected behavior.
But, if an existing user who has already shopped in my store, and saved they billing address (before I made those new custom fields) does the same and clicks Next, the system will skip required custom fields, and let them continue checkout process without any error message.
I reproduced this on the Hikashop demo page as well.
Could you check why existing users are not getting the error message to fill required billing address fields?

Thank You

Thank you nicolas, it works great!

Regards!