When using Remote Play with a Linux host (which works now - yay!) audio is played on the host even when "play audio on host" is disabled. More troublingly, using the volume buttons on the client (the Steam Deck in this case) gets passed through to the host to affect its volume settings (volume notification pops up on the host). The host shouldn't be playing audio at all, and the client's volume controls should affect only the client.
When using Remote Play with a Linux host (which works now - yay!) audio is played on the host even when "play audio on host" is disabled. More troublingly, using the volume buttons on the client (the Steam Deck in this case) gets passed through to the host to affect its volume settings (volume notification pops up on the host). The host shouldn't be playing audio at all, and the client's volume controls should affect only the client.