Your non-debug Kodi log doesn't show much, but since the media is 2160p ~ if it's an HDR file Kodi does not currently support HDR so the colours will appear muted and washed out. Solution is to see if the original disc has a non-HDR version on the disk and re-rip.
chewitt, Thanks for geyour response, since I have been experincing this issue I further digged into this washout issue it became apprent that the cuurent Kodi stable doesn't suopport 2160p. Hence thanks for the clarification, however, is there a plan to add this feature or 2160p in the next kodi build.
Here is the link from Kodi on issue relating to 18.5 Kodi stable unable to play HDR