My Apple TV (4th gen) has been running really well, without any faults. But since upgrading to the latest version of tvOS, whenever I start it up I receive a message briefly in the top-right corner, saying that the network is not connected. It goes away after a second and everything runs normally (however if I try to open an app too quickly after startup, the app will think the Apple TV is offline). This never happened with the original tvOS, and the box is connected to ethernet so it shouldn't need to drop the connection. Is anyone else having this problem? Is there some kind of power-save setting that can be adjusted to prevent it from disconnecting?