U r right...Earlier I didn't restart the device...So found no changes..This time after changing to 8 bit restarted and no HDR...Yes getting 5.1 always(verified in AV receiver)
But even I tried 4.4.4 8bit, never got HDR at 4k60.
Once you get time, just recheck, if you are getting HDR at 4k60 with 4.4.4 8bit