Does pipe output not work with AirPlay2?

[owldown]

I got a working setup that allowed me to AirPlay from my phone to Shairport, which used a named pipe, which OwnTone then plays to two different AirPlay (1) targets. I decided to rebuild Shairport --with-airplay-2, and the result was that both end devices played static instead of music. The volume control still worked.

I was playing an Apple Lossless track from my iPhone for testing. Is it not possible to pipe audio to OwnTone with Shairport using AirPort 2 mode to receive the audio?