So I did a bit more testing. I have a Denon 2112 which supports AirPlay. I am able to play Spotify via AirPlay on my iPad to the Denon with no issue. As soon as I flip to the axiom air it kicks off back to the iPad. I am not necessarily concerned about Spotify just using it to test. If it works with my receiver shouldn't it work with the AxiomAir?
So i just tested my wife's iPad with YouTube, and Apple music and it works perfectly with the Denon but will not play to the Axiomair. Let me know if you need more info. Happy to provide!