Vizio TV no longer displaying content when 4K is selected on Series X

Hi I have a Xbox series x with a Dolby vision compatible tv also will the allow Dolby vision playback selected in settings on and it still only displays in HDR only when playing 4k blu rays ? I have set it 4k 60hz and the games display in Dolby vision plus streaming apps but not 4k disc playback! Is this correct that the xbox series can’t do this ?

This a quote from the (basically) A/V expert at Polygon

"Right now, there are only two TVs I would feel comfortable advising someone who plays games and wants a 4K/HDR display to buy: the Samsung KS8000 or the 2016 Vizio P-Series. Of the two, the Samsung is the better display,
but the Vizio is slightly cheaper. Almost every other 4K/HDR TV out right now feels like an enormous compromise at best, and a giant waste of money at worst."

The Xbox One will only output at 1080p

The Xbox One S features 4K Ultra HD Blu-ray, 4K video streaming and High Dynamic Range (HDR) for games and video. In addition to supporting 4K video content when used in conjunction with a 4K TV, Xbox One S will also upscale non-4K content
to display at 4K when paired with a 4K TV. When you set your console resolution to 4K UHD, everything on the console — Home, games, and apps—will display at 4K. 4K content is displayed in its native 4K resolution, and other content (like 1080p content) is
upscaled to 4K.

The Xbox One X - 4K content is displayed in its native 4K resolution, and other content (like games encoded for 1080p) is upscaled to 4K

More info:

https://support.xbox.com/en-US/xbox-one/console/4k-on-xbox-one

I'm having EXACTLY the same issue that you're seeing here, and have tried the same CC settings within the Xbox as you have, to no avail.

My TV/Display is a Vizio 4K P-Series, so it's good to know that it's not affecting just the Vizio.

Have you had any success with troubleshooting the issue?

"Hey everyone,

Does the issue persist if you were to change the TV resolution to 1080p? To do this, follow these steps:

Settings > Display & sound > TV resolution > Select 1080p

As long as 'Allow 4K' is checked, changing the TV resolution to 1080p will not affect native 4K content from displaying in 4K. After the resolution has changed, restart your Xbox One console and see if the issue persists.

Thanks!"

I tried this, the color degradation of Netflix goes away, however 4K no longer displays as an option for any of the content and it does not play in 4K. Also the issue of cutting out persists through 4k hdr UHD Blueray movies regardless of being set to 1080p,
it does however switch to 4k hdr automatically when playing the discs, but it actually cuts out more than when its set to 4k uhd