Client: Plex for Android 6.11.2
Plex Media Server 184.108.40.20633
If an Extra (e.g. /Behind The Scenes) is played back on the Nvidia shield in 'Original Quality' then the subtitles will not play; if the quality is changed to Automatic then the subtitles will show. This is a bug.
Media info of subtitle.
ID : 3
Format : VobSub
Codec ID : S_VOBSUB
Codec ID/Info : Picture based subtitle format used on DVDs
Language : English
Default : Yes
Forced : No
My subtitles are NOT compressed.
To allow you to reproduce the issue: