Using my sandbox I set up an order and go through the PayPal payment portal, pay, read the orderId and then fetch the order info using the orderId and the accessToken. But the payment_details always come up null.

The client side script which works fine. I can fetch the order with the returned ID but it only has a few fields populated. I also set the 'Prefer' header to "return=representation" to try and coax it to fill out the returned order data. I've tried using both V1 and V2 API. ("sandbox_url_here/v2/checkout/orders/id_here"). Does anyone know what I am missing?