Scope:

Only one shipping address is retrieved using retrieve_a_subscription API.

Why the events are not generated when multiple shipping addresses are added ?

Clarification:

Currently ,the retrieve_a_subscription API provides the shipping address which is tagged to the label shipping_address and other shipping addresses will not be retrieved.

And also the event generates only for the shipping address which is tagged to the label shipping_address.

We don't have any workaround for this.