Billing / shipping address doesn't update in My Account

I’m facing a little weird problem: when I change the billing or shipping address inside My Account screen, the address seems to have changed, however after refresh the page, the old address remains there and I look at the admin and check that anything was changed.

Have you ever seen that issue before? My theme still uses Woocommerce 1.6.4 because we’re working on a new theme development and we can’t update WC yet.

Any helps?

https://www.ads-software.com/plugins/woocommerce/