tvOS 11.2.1 Has Been Released for Apple TV 4 & Apple TV 4K Users
https://wccftech.com/tvos-11-2-1-has-been-released-for-apple-tv-4-apple-tv-4k-users/
tvOS 11.2.1 is now available to download for Apple TV 4 and Apple TV 4K users. It brings the same HomeKit patch as iOS 11.2.1.
Alongside iOS 11.2.1, Apple has released tvOS 11.2.1 as well. Both software updates feature the same changes, and it’s important that you download it right away.