Subtitles will not download

[ballsystemlord]

I decided to check if youtube had some videos with subtitles and was pleased to find that it did. I set youtube-dl to work and it told me that the pages did not contain subtitles, yet I saw them with firefox so, I know they are there. I submitted this info here:
ytdl-org/youtube-dl#2526
but was unable to resolve the issue. I therefore think it is a bug.
I used both an older and a new, self compiled, version.