Apple has begun rolling out tvOS 11.4.1 to all Apple TV users. This comes after the update was first released to beta testers over the course of a few weeks. Now, anyone with a fourth- or fifth-generation Apple TV can install the update. It includes bug fixes and stability improvements for your TV.
To install tvOS 11.4.1 on your Apple TV, head over to Settings > System > Software Updates > Update Software and hit the download button.
