Recently I have been watching a show which was produced in a foreign language but has an excellent English dub. The DVD release uses a forced (or otherwise default) subtitle track for a few random elements which could not be conveyed in the audio track, like visible text that you are expected to be able to read.
I tried using MKVToolNix to mark these subtitles as default and/or forced. Plex notices the change and updates the subtitle name, but still does not display them by default; I have to manually turn on subtitles for every single episode, pausing the video for 5 seconds every time. This happens even if “Automatically select audio and subtitle tracks” is checked.
This support page talks about this issue, but annoyingly it does not specify what happens in the typical case, when subtitle preferences have not been changed. And I don’t want to change my subtitle setting anyway, because neither option seems appropriate. I could set them to display for foreign language audio only, but that obviously wouldn’t help me here because the audio is in English. The always enabled setting would force me to disable subtitles everywhere else, so it just inverts the problem.
Is there any way to get Plex to always display only forced subtitles?