QR sent my bag from MEL to TLL, although HEL-TLL leg was on a separate PNR.
I dropped a line to Platsku support with some feedback, including how awsome it is that QR and CX are doing this.
I got this reply: "Hopefully, in the future we could also check the baggages to final destination on Oneworld airlines, even on separate bookings."
I was expecting "Blah blah blah, policy, blah blah blah, no"