Server Version#: 1.12.2.4929
Player Version#: 2.29.1.961-bb236059
Odd that it’s working this way, I have 2 PC’s, the Alienware would have no problems displaying subtitles, in any layout, however, in my NUC7i7, subtitles only display when not in TV layout.
Since you have one that works and one that doesn’t, switch to tv mode and compare the settings between the two machines. It will either be a video or subtitle setting.