Server Version#: 1.25.8.5663-7000
Player Version#: 9.0.1.31729 (bc3395ec)
My Nvidia Shield autoupdated my Plex Player on April 1st to the above version.
Ever since the update any 4k movie I try to play, using the TrueHD audio track, fails to play and crash closes Plex after showing the egg timer for a few minutes.
After a lot of diagnosing I rolled back the Player version to the last one I had - 8.31.2.31546.
This resolved my problem.
It looks to me like the April 1st (ironic) version is still in Beta so I don’t know why it would be released the the public.
Anyway. Hope this helps anyone facing similar issues.