Hi @tomasw Happy New Year 
You’ve clarified that the records which don’t have any line items and shipping labels indicates that a return has been created for that order, which logs a shipment as well.
“request_id”: “5ff36079094a8e537899ddd5”
This is one of this kind of record. You can see two shipments records and one of them is empty line items and shipping labels.
But, I’ve noticed that there is name refunded and needs_refund in Shipments data and also Order rma_labels. And these are set to False.
As you explained, those kind of records indicates a return, doesn’t it make sense that either refunded and needs_refund should be set True?
Thank you
Jessie