xbox one controller light flashes and then wifi disconnects

Yes, unplugged and reconnected everything multiple times. Without fail, controller light starts blinking, then the wifi disconnects.

Yep, same problem, seems to be completely random. Tried it with two controllers, still the same. Took it back to the store and they tested it - fine!

Got it home, plugged it in (having reset to factory settings) controller dropped out several times as I was setting the Xbox up - so not even connected to the WiFi.

Tried it with controllers plugged in, with the house WiFi switched off, just kept doing it.

Then this afternoon - perfect! But nothing has changed in the house.

What I did notice though is that whenever the controllers dropped out, invariably it disconnected from the wifi as well.

Something else I have discovered, when the controller drops out and just flashes, the sync button on the side of the x box doesn't do anything. Then give it a few minutes after pressing the button and the XBOX logo flashes once and all comes back to life,
temporarily.

Have Microsoft admitted there is an issue with the WiFi cards in the X box one, it seems to me that even if the controller is plugged in, the WiFi card can randomly disconnect it

Greetings to the thread! If four green lights flash continuously on your controller you may already have four controllers synced to the console. If you do, you will not be able to sync another controller until you disconnect one. Hope this helps!

Use the Flashing Lights Solution. Choose one flashing light as the problem and follow the steps in the solution:

support.xbox.com/.../flashing-lights-wizard.aspx

Try the following steps:

Disconnect and reconnect all accessories.

Remove the hard drive.

Remove any USB flash drives.

If the above steps do not solve the issue, request a repair

Which lights do flash? The ones which show what controller is online, around the power light? How many lights are flashing?