(I posted this under DVR Troubleshooting because changing a setting on the DVR seems to affect it.)
Playing with some things I just tried to watch a recording on my iPhone over a cellular connection. I hit "Watch Now," get the spinner, the first frame (I assume) shows up, the spinner goes away, there's a brief snatch of sound, and the app bails out back to the "Up Next" and "Recently Recorded" screen. This happens with every single recording.
Live TV works fine. Recordings work fine when locally connected.
Have been using software transcoding so I can get the subtitles. Switched to hardware transcoding. Problem went away. Switched back to software transcoding. Problem stayed away, but... what's this? No subtitles! Hmmm... Picked another program. Bailing out problem returned. Went back to the one I tried with hardware transcoding. Played, but no subtitles.
Colour me thoroughly confused.