video app play back issue in 4k hdr

I can verify this issue...Netflix UHD does not work on Xbox One S. I have a Vizio M55-D0 with the latest firmware enabling HD10 support. My TV is now recognized by the One S video settings as 4K HDR capable. I am able to enable HDR support and it works beautifully
with the Blu-Ray app (Mad Max 4K Blu Ray playing 4K, 24fps, HDR as verified by the Vizio settings app). However when I start Netflix, the screen flashes, colors mute, and video fails to switch to HDR or 24fps. Netflix app is clearly broken right now for HDR.
If I switch HDR off on the One S, Netflix app is fine, plays 4K correctly, colors are fine obviously no HDR.

I've started having this issue on my Xbox one x , non Scorpio edition . Watching GN will do it and also Tech Yes City (but his is 30p @4k) . Watching the same videos on my S (the 30p ones play in 4k) , I will not get this issue . I'll watch to see what
the VP9 is it to see if it's the same . YouTube updated it's app on my Hisense 4k HDR10 tv & either they removed the HDR support or Hisense did . I no longer have HDR on it , yet the signal shows VP9.2 (which should be HDR) . All my issues seemed to occur
at the same time , which makes me think it's YouTube messing around .

Perfect - thanks...

Turned off 4K and HDR and I'm able to play.

I then turned 4K back on but not HDR and Its still working ;-)

Native 4k Hdr I understand, but what is video content enhanced with hdr hdr called?

I own an Xbox One S with most current updates and a Vizio M55-D0 55'' 4K HDR enabled TV with the Firmware v2.0.13.13 update that enabled support for HDR10 (it already supported Dolby Vision).

Xbox One S Video Output settings: 4K resolution, 4K enabled, 24fps enabled, HDR enabled (advanced TV details reveal my TV supports everything but 50hz). Color Sampling set to 10bit. Although my TV's specs report HDMI can handle 12bit color apparently the
included HDMI cable cannot handle that bitrate nor do I believe any content actually offer more than 10bit color. (Setting the color to 12bit results in complete blackouts of video signal when attempting to view a 4K Blu-ray).

Vizio M55-D0 Settings: HDMI 1 Color Subsampling Enabled (enabling HDMI sourced HDR). Xbox One S connected with included HDMI cable directly to HDMI 1.

1. Deadpool Ultra HD HDR Blu-Ray (encoded with HDR10) plays fairly flawlessly with the Vizio companion app showing that it is playing in HDR and showing dramatic improvement over the darker and less vibrant playback with HDR disabled on the Xbox One S. Notably,
the video signal did still drop occasionally out as if the HDMI cable was being overwhelmed with data or perhaps the disk reader in the Xbox was having trouble reading the data quickly enough. The Blu-ray plays flawlessly when HDR is disabled and the disk
recognizes it doesn't need to read at such a high rate, also presenting a message confirming it detects it cant send an HDR signal.

2. Netflix app produces issues reported above. Upon launching and giving Netflix full control over the audio and video output, the color, both within the app interface, videos and on the Xbox Dashboard itself become distorted and washed out (and the resolution
of the dashboard seems to increase). When playing content that is advertised within the Xbox Netflix app as HDR, such as the movie "The Do-Over", or series like Daredevil S2 or Marco Polo, the Vizio companion app reports that that the TV is not receiving an
HDR signal. The video appears noticeably grainier with blacks showing artifacting compared to using the same app with HDR disabled in the Advanced Video Settings on the Xbox One S. The color and clarity of the image is far improved with HDR disabled vs attempting
to enable HDR and still not actually receiving an HDR signal. It may also be noted that there appears to be a video signal drop out (not pauses, but missing video) as with the Blu-Ray in HDR present when attempting to watch Netflix with HDR enabled. It appears
as though the included HDMI cable or the system itself is struggling to deliver the data. With HDR disabled, 4K content seems to stream perfectly with this app and looks really good despite not having HDR.

3. Amazon Prime Video, which although it does not produce the color distortion that the Netflix app produces when launched, also does not seem to send an HDR signal when streaming Prime TV Shows that supposedly offer the feature such as "Mozart in the Jungle"
or "Transparent". 4K in general seems to work fine though.

This is frustrating for 2 reasons. One, I'm not getting HDR content from apps (Netflix or Amazon) as I'm supposed to as well as the inconvenience of having to enable/disable/reenable HDR functionality when using Netflix. Because Deadpool is encoded using
HDR10, you would assume the HDR10 used by Netflix or Amazon would be decoded correctly by my TV. Also, the TV came with native Dolby Vision support, in the event that's what they used.

P.S. Only Netflix and VUDU offer native 4K/HDR streaming to the TV via SmartCast built into the TV. While VUDU streams my 4K movies (Batman v Superman: DOJ) in HDR (confirmed by Vizio app) and looks fantastic, my native Netflix cast ALSO produces the color
distortion, washed out blacks, and graininess that is present when attempting to play on Xbox One S with HDR enabled. I'm assuming Netflix must be responsible for the color issues i'm experiencing.