Hello: I have just run into the same issue with API version 2021-10.  Did you ever get a solution? My Request-ID that failed is  '925b234c-3390-495b-9c04-7e84d1cb3fef' if that is helpful.

Hi:Noob here.  I am downloading orders and refunds to sync with my system.  When I go to download refunds, I get entries but they have no refundLineItems values (empty edges[] array returned).   Is this possible?  Here's the image of the test refund:...