Forced subtitles on The Terror Season 2

Watched the first episode (mkv) with my ATV4K and there were no subtitles showing, I had to cut them from forced to on all the time. Anyone seen an issue here?

What type of subtitles?

Were you able to select the subtitles via the Subtitles section of the Playback Menu during playback?

They were speaking Japanese at times, and it did not show. Ill try and select in the menu next time.