You need to use TSReader either by creating a text file on c:\ called usetsreader.txt, or by installing any SVN for MP 0.2.3.0 (16540 or later).
Same thing, but just for notice, it has been stated pretty well in another thread too;
https://forum.team-mediaportal.com/showpost.php?p=209274&postcount=485
Since you seem to run latest build, there may be something else broken in your system. You have tried to select different subtitle tracks by pressing 'L' ? i do not know if first DVB subtitle track is active by default.
But, anyone else having new unwanted feature (with recent builds) where Rewind and fast forwarding when time shifting is not ok? It seems to jump back to end of file (new written data) constantly when seeking back or forward.
Something wrong with my installation or known bug? Haven't seen any similar posts about this feature yet.
I have tried different codecs besides Cyberlink PDVD7 and on some build it seemed to help when switched to MPV decoder, but resent build it does not help in this issue anymore.