Thanks @ChuckPa and good luck!
As an aside… the majority of UHD movies I’m adding these days are both HDR10+ and DoVi P8. The Fire TV is a pretty much unusable device until this is fixed for anyone in a similar boat.
I’d hope that a CCwGTV would be solid alternate device, but it currently has the issue where it can’t play AVC files with 4 Reference Frames which is all Blu-ray backups. That means the CCwGTV is unusable for me too since that describes all my FHD files. It also has the same issue as all Android devices (Fire TV included) with currently being unable to play when there are multiple versions if an audio transcode is necessary.
Maybe a Roku? Nope, because it doesn’t support PGS subtitles, and the majority of my movies are Blu-ray backups with PGS subtitles… many with Forced subtitles for foreign language translations.
Only thing left is the Apple TV, but it currently has an issue with choppy UHD HDR video playback for some movies.
I personally am currently using Infuse on Apple TV, but am looking forward to being able to their being a streaming device that I can easily recommend to friends/family again.
I love Plex and am a diehard user, but this is becoming problematic 
