@ChuckPa I’m testing that version right now; if I enable HDR Tone Mapping, it hangs, or crashes.
****** PLEX MEDIA SERVER CRASHED, CRASH REPORT WRITTEN: /config/Library/Application Support/Plex Media Server/Crash Reports/1.40.6.8820-a3b5dd1b4/PLEX MEDIA SERVER/530b8dde-fa6e-48eb-e84df9a1-cabda9c5.dmp
That thread is really focused on the sub burn-in (Nvidia and Intel devices have been improved on Windows systems and Nvidia, Intel, and AMD (assuming no ToneMapping is required) devices have been improved on Linux based systems), so I’m not sure the tone mapping issue is tested properly with that release.