They should at least state Airplay is not compatible with all Airplay certified devices, only ATV.
I am actually getting a bit peed of with the BT sport app, I also have Nvidia Shield TV and it won’t Chromecast to that in 4K or 5.1 even though the device is capable.
Are company’s (Apple, Microsoft, Google and Samsung) requesting that BT nobbles other devices? I would say so.