Customer cannot register without zipcode (even setup doesn't require it)

Hello there.

I setup the system for my country (SV) and language (Spanish).

Address handling is setup for NOT requiring zipcode (we don’t use zipcode)

However any customer (guest or register) cannot register without putting something into the zipcode field (like „000“) because of this error:

„The selected billing address is not valid or incomplete. Please check your entries.“

This seems to be a problem with the country/language because the default install for US/English doesn’t appear to have tha issue.

Any solution or workaround available for this issue? I think a workaround could be to fill with „000“ the zipcode field with a trigger but the flow builder doesn’t allow to update the customer record.