Bluetooth LE pairing behaviour when accessory refreshes IRK

My BLE accessory is already bonded with iPhone. The Phone is then forgotten from the accessories list. Accessory then updates its identity info with new IRK, but the identity address still remains the same. Upon trying to pair with the phone, iPhone does like the new Irk and the old identity address.

Is this intentional?

Bluetooth LE pairing behaviour when accessory refreshes IRK
 
 
Q