Apple TV WiFi issues (Disconnecting)

You may want to re-examine which Wi-Fi channels are being used by your router/access point. If it overlaps with with the channels in use by your neighbors, then that will cause interference. If your router/access point has an Automatic Wi-Fi channel configuration, then a restart may be enough (at the moment when the issue occurs), to have it make a new best choice.

You may want to examine other equipment in use in your house that may cause interference. Anything with radio emitting capability or high energy use electrical equipment, that goes on and off intermittently, e.g. a refrigerator, can be a source of interference.

You need a Mesh network. Streaming 4K media requires a lot of bandwidth, your current network has a lot of devices on it and you have reached its limit. There is nothing wrong with your Apple TV it’s the network being overtaxed. The issue is not network speed it’s network bandwidth.you spent a lot of money on a router, for less you could get a nice Mesh network.

Other devices working does not rule out a network issue. Proper investigation, starting with a diagnostic report, would be needed to dial in what is occurring within your environment.

You can claim it is HW or FW of the device, yet it is working just fine for the vast majority, including those that regularly test for this forum. The amount of reports seen amounts to a select group of people, which occur on a sporadic basis, in cases where adequate troubleshooting is done then the issue is rectified. There can be no proper resolution when that is refused. Otherwise it would be widespread, with reports everywhere (including this forum being flooded on a consistent basis) and this thread would have also received numerous responses by now.

If you refuse to believe there is anything wrong on your end and are intent to simply blame the device then there isn't anything anyone here can do.

I have well over 30 wi-fi devices on my network including 4 Apple TV's and all devices work just fine. I had similar issues to you about a 1 1/2 years ago and upgraded to a Mesh Network, guess what the problem disappeared. My home is a single store 2500 sq. ft. house, a partial list of devices I support are:

4 Apple TVs

1 iMac

1 Mac Min

1 Macbook Air

2 iPHones

2 iPads

A Nest Thermostat

2 Alexa

4 Smart TVs

Home Theater Receiver

and the list goes on........

So as mentioned, if you insist it is the Apple TV's and think your network is fine then there isn't a thing anyone on this forum can do to help you out.

You mention doing all this troubleshooting but you haven't really gone into that aspect much within your posts. There is no possible way for anyone here to know exactly what you have done, nor have the correct information to suggest next steps.

Based on the information given it looks as though only a few rudimentary things were tried and then you blamed the device. For example, you continue to insist it is the Apple TV because they are the only devices experiencing this issue.

I also have two of them, both of which work fine. Not only are they used personally but also vigorously tested for the forum.

These same types of symptoms can also be easily found by users who have other devices, a lot of which choose to blame the device simply because everything else works fine. Again, for those who do investigate further (some cases require more work than others) the issue is almost always rectified.

Moving to another device may yield different results but that doesn't mean you will never experience it elsewhere in the future, unless you fix the problem within your environment. There really isn't much else to say so I will bow out of this discussion.

I read it and still think you have a bandwidth issue. Okay, though if you insist it is the Apple TV’s then I’m done. Good luck.