REST PORels pulling for all lines instead of just the one specified

I’m playing around with pulling the PO Releases in Swagger and I’m trying to get all of the releases for a single line, but it’s pulling back the releases for ALL lines. Why is that?

https://<fqdn>/test/api/v1/Erp.BO.POSvc/PODetails(ISI,162944,1)/PORels

Rather than using the POSvc/PODetails to get PORels, I would simply use POSvc/PORels and add a $filter condition for PONum and POLine

You can also play with the expand command if you need parent child

This bug is still occurring in 10.2.400