2025-10-06, 09:10 PM
You are not missing a hidden setting. With Jellyfin 10.10.7 and the Roku app 3.0.10, the Roku client does not honor the web app’s “Subtitles | Subtitle Mode: Always Play” for all sessions. On a fresh launch, it falls back to None, so you end up picking English each time. This is common with PlayOn MP4s that carry both an embedded MOV_TEXT track and an extracted .srt.