Xbox Series X Does Not See HDR Combability with Hisense 55HG8

I have a Hisense 43H7C with the same issue. The Hisense 2016 4K televisions do "process" HDR10 metadata but the Xbox one s does not recognize the capability and I'm using a high speed HDR capable HDMI cable as well. I know the HDR works because I've tested
it with HDR video on a USB stick and the tv's built in media player. There needs to be a way to force the Xbox S to output HDR regardless, or Hisense will need a firmware update to allow the Xbox to recognize it can process HDR....

I'm having the same exact issue I have no problem displaying 4k but my HDTV does support hdr 10 but no matter what i do the hdr option is greyed out . This is rather frustrating as I would love to see what hdr looks like on my tv. I'm using the supplied
HDMI cable that came with my xbox one s. My tv model is a Hisense h8 series model number 50h8c

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 .

I have a Sharp LC-50n6000u which is owned by Hisense. Materials that came with TV say it has HDR Processing but as others here have said, The Xbox One S does not recognize it.

I had the same / similar issue with my old 4K 60hz none HDR / HDMI 2.0 monitor when watching movies and some times in games with the Series X,

As soon as i upgraded my monitor to a 4K 144hz monitor that has HDR / HDMI 2.1 ports, i no longer had this problem,

I'm not sure what the problem is, but my guess is that the HDMI 2.1 port on Series X doesn't play well with HDMI 2.0 port of monitors, or it's the Series X trying to force HDR on, even if the monitor does not have / support HDR and the HDR in Series X menu's is turned off.