[BUG] Subtitle selection does not work at all!

Hi all.

Not fixed for me (nVidia Shield with Plex 9.3 or 9.4-beta).

I have tried with several .mkv files with an english subtitle (ASS) and a french subtitle (SRT) included.
If I select the french one (it’s really french, I’ve tested with VLC), the english subtitle is played.

If I ask Plex player to download a french external SRT (OpenSubtitle), it’s downloaded and correctly integrated.

Could be linked to this?