Per that thread the issue where GPU Transcoding wouldn't work unless Tone Mapping was off was resolved in a late September build. My new unRaid build using the Linuxserver-Docker version of the app still has the problem. It won't use HW Transcoding unless Tone Mapping is off. Per their Github page they are on Plex build 1.32.7.7621-871adbd44-ls193 which should have the fix in it.
I'm new to unRaid and am not sure the best way to proceed. Do I have a configuration issue somewhere, should I try the official or binhex version, wait for a new build to fix it or report this somewhere? Thanks.