XBOX Series X/S HDR10 fallback not working correctly



First I gotta say awesome work to the devs who made HDR possible on the Xbox Series X! Dolby Atmos and DTS:X audio passthrough is working well, HDR 10 is working for the most part.. However I am having an issue with some Dolby Vision Profile 7 files that have HDR10 fallback. As I am not using Dolby Vision on the Xbox Series X I am only wanting to use HDR10 layer for my 4K UHD Blu-ray files (.mkv container). 

I cannot seem to figure out why some .MKV files don’t fallback to HDR10 properly? I few 4K UHD that I ripped from disk that won’t fallback to HDR10 are WarGames 4K blu-ray, Weird Science 4K Blu-ray and the new Killer Klowns from Outer Space 4K that I got early over the weekend.

They don’t seem to have anything weird about them when pulling media info, any clue what could be happening? All ripped using MakeMKV as well with no additional conversion. Thanks for any tips and also I am using the Plex Mod for Kodi add-on to connect to my Plex library. 

Xbox Version: 21 Omega on Xbox Series X
TV: Sony x90j