USB-C 3.5 headphone adapter, 8.0 Oreo and Pixel audio problems

[malbiniak]

Is anyone else having issues with USB-C to 3.5 audio problems with third party (non Google) apps? When the adapter is in and connected to the 3.5, audio still plays through the phone.

I was originally convinced it was a hardware issue, but an adapter replacement later and consistent success getting audio through Google music, it sure seems like a software problem. 

Here's to hoping there's a better solution than getting audio to work with Google Music and switching back to Spotify