Xbox Series X Ethernet Issue and Wireless Issue

Im having the exact same issue! except with it being the wireless connection to the router itself. No other devices are playing up, except my Series X. I have only found a handful of people with the same issue and sadly no answers, apart from running a
ethernet cable directly from the series x to the router. Maybe a wifi hardware issue?

Im having the exact same issue with my Series X as DMcC1 though im using the modem/router provided by Spectrum Cable in western NY. Ethernet cable works fine on xbox one and any other device I connect it to, but when I connect it to the series X it will
connect for about 2 seconds and then disconnect and tell me i dont have an ethernet cable plugged in. It then alternates between connecting for about 2 seconds and then disconnecting for a while and then repeats the process. Wireless connection seems fine.
I guess im glad to know im not the only one.

Did you manage to fix the connectivity issue? My Series X constantly drops connection to xbox live/internet despite an ethernet cable being used.

Hi

I have had similar problems with my sons series x dropping internet connection and the only way of curing this was connecting the console directly to the router with an Ethernet Cable. It now works with no issues. I hope this helps.

And to add my sons Xbox one worked perfectly on our WiFi with no issues but the series x has issues, I’ve no idea why it has these issues but the cable sorted it.

Marmite

Recently got a Series X. It is set up with an ethernet cable directly into the router.

When I switch the xbox on and login to my account the xbox does not connect to the internet. I cannot launch a game.

I can solve the problem by restarting the xbox though I may need to do this several times before it connects to the internet via the ethernet and allows me to launch a game.

I have not changed any internet settings since taking the xbox out of the box.

Any suggestions? Is this a known issue?

This has been an issue for me since launch. I have 3 series x. All three do it. I have bought new routers, had comcast ship me a new fiber business class modem, bought new cables, etc. I have come to the conclusion that it is a microsoft issue and they are just far to lazy to fix this.