Previously, if you added a primary billing address to a contact, that would be the primary billing address associated with their on file card. When you selected that card for a transaction, the AVS info would populate.
Now it does not. In order for the AVS info to populate, you have to not only input the primary billing address in the customer record, but then, have to go to the vault, select that card, and check "use primary address" to make that the billing address on that card. You can then run that card and it pulls in the AVS info.
Its a great feature that you can associate different billing address with different cards on file for the same customer. But the default address should be the default address unless otherwise selected. This is going to require a LOT of work for clients to go back and check that box for all their clients