I have a problem viewing mkv files with embedded subtitles in Samsung TV app.

samsung-smart-hub

#1

I have a problem viewing mkv files with embedded subtitles in Samsung TV app. It was working fine in the past and stopped working. The files are working fine in ios app and in the browser but no subtitles when you watch in the Samsung TV app (I have Samsung 55es8000 TV)
Please help.
I was using the transcode before mode until now. Few days ago (new plex version in the samsung tv) it stop working