Using Kodi 21.0 stable for my Shield and FireTV 4Ks and the HDR format (HDR10 or DolbyVision) is no longer identified for a lot of my 4K movies.
Using TinyMediaManager to store posters / fanart / metadata locally for all titles. Using Arctic Zephyr Reloaded skin for both v20.5 and v21.0. On Kodi 20.5 it is shown for every HDR/DV title, but not for Kodi 21.0.