Private Storefront Token Not Accepting Buyer IP

[drsw]

Hey folks

According to this page, you need to use Shopify-Storefront-Private-Token along with buyer's IP as Shopify-Storefront-Buyer-IP to avoid throttling.

I tried this on postman with private token generated via delegate access token, but after 2 successful requests the throttling happened:

Tried manually changing the IP to a device using different IP and different email address for the recover account, still to no avail.

Can anyone enlighten me?