Internal error in case if refund and suggestedRefund fields are both present in single GraphQL query

[Lafroaig]

Dear support,

tried simple query 

{
  orders(first: 10) {
    edges {
      node {
        refunds {
          id
        }
        suggestedRefund {          
          __typename
        }
      }
    }
  }
}

and got error 

{
  "errors": [
    {
      "message": "Internal error. Looks like something went wrong on our end.\nRequest ID: c4fe1810-0a8b-4bf6-b86e-ca5896f54f99 (include this in support requests).",
      "extensions": {
        "code": "INTERNAL_SERVER_ERROR",
        "requestId": "c4fe1810-0a8b-4bf6-b86e-ca5896f54f99"
      }
    }
  ]
}

Thank you

[Liam]

Hi Lafroaig

On our side it looks like the API is not receiving data for refunds - the message I'm seeing id "Missing object id for Refund". Just to confirm - are there refunded orders on this store, and does your app have the read_orders scope ?

[Lafroaig]

If query has only `refunds` or only `suggestedRefund` field, it returns data. This means there're refunded orders in store.
but my question is why I encounter error in case if query has two such fields?