When Apple TV launches I always get a screen to select audio output

My Apple TV (3rd Gen) is connected to a Sonos soundbar via an HDMI cable.

When Apple TV launches I always get a screen to select audio output that shows other devices in my house (that aren’t connected to the TV).

In Settings I have the HDMI set as the output.

Is there anything I can do to stop this screen from always popping up?