How to get DVB subtitles enabled on live tv / recordings

All SD channels have burn in subtitles but HD channels seems to use DVB subtitles which seems not to be enabled by default. Are there any way I could enable these subtitles for LIve TV and for recordings? Have checked all the options and did not find any option that would help me.

Someone from Plex should give some kind of answer for this. This is pretty much show stopper for plex dvr.
So this worked in earlier betas so should not be that hard to get it back, right?