I encoded some DVDs, and kept the VOBSUB track so that I could enable/disable subtitles. Its in an MKV container. The issue is that when I play them on one of the Android clients, either my phone or the Shield TV Pro 2019, the subtitle is positioned too low. If there’s only one line of text, its off the bottom of the screen, if there are two, the top line is on-screen where the second line should be, and the second line is still off-screen. Roku works fine, as do the Plex Windows client and VLC on Windows.
Android Shield TV version: 9.3.0.32977
Android Phone version: 9.3.0.32977
Plex server version: 1.26.2.5797 on Windows