Apple TV goes to sleep

Core Machine (Operating system/System info/Roon build number)

16GB Ram
Latest roon server version

Network Details (Including networking gear model/manufacturer and if on WiFi/Ethernet)

Gigabit Ethernet

Audio Devices (Specify what device you’re using and its connection type - USB/HDMI/etc.)

Apple TV 4

Description Of Issue

Using iPhone as Control. When sending audio to the AppleTV, it seems unaware of it and goes to sleep as per the AppleTV sleep settings (15 minutes). I do get audio, it plays fine, but it doesn’t show album art, time of track or anything. Just audio and goes to sleep after 15 minutes.

Anyone else has this issue - how to resolve?