Thank you for the follow up @umami and providing the requested feedback! Both are very appreciated!
I have left note with our tech team to see if we have an ApplTV in house to try and confirm this behavior with. I will be sure to touch base again once I hear back.
-Eric
Hi @umami ----- Thank you again for the feedback and more importantly, thank you for your patience here while I have been discussing this report with the team.
I did some further research in to the firmware your Apple TV is currently running and it looks like tvOS 11.4 (15L5536c) is indeed a beta version. Have you tried rolling back to the most recent āstableā release to confirm if the problem still exists?
Additionally, I am going to be submitting a ticket to track this behavior in our system so we can keep an eye on any Roon users being affected by this behavior.
-Eric
Eric,
I havenāt yet reverted to a non-beta version of tvOS. Surprised it didnāt revert itself at reset, which suggests it will take some further investigation to figure out. Meanwhile, I have a workaround for Roon that doesnāt go through the ATV, but obviously would prefer that this work as it shouldā¦
Thank you for touching base with me @umami, I am curious to hear what the experience is like with the Apple TV while on non-beta version.
Please do keep me updated when you roll over to a production build so I know if the issue is still being experienced.
Many thanks!
-Eric
I too am running 11.4 on Apple TV and canāt get Roon via Airplay at all. Getting the same behaviour as the OP.
Iāve tried resetting the Apple TV to factory settings but even that doesnāt work for me 
Closed due to inactivity. If you are still seeing this issue, please open a new support thread.