The TV App recently disabled the (experimental) support for libvlc which had its problems but also had the ability to sync audio and subs. So after this switch, it's no longer possible to sync. I think they are planning to implement a sync feature for the exo player, but unsure when/if that will be the case.
Jellyfin: The Free Software Media System
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Oh.. It's not always that I need to sync the subtitles because in most cases bazarr gets the best subtitle but eventually even the SRT with the best score still has it a little off sync..It is good to see if the video is being transcoded too. I hope they implement it back soon.. Thanks!
If you connect to Jellyfin through Kodi with the JellyCon add-on, you can sync audio, subtitles etc. when it's playing.
While it's possible to navigate through your Jellyfin libraries from within the Jellycon add-on in Kodi, I usually find it quicker to just use the Jellyfin app or webapp on phone/pc to find the desired media, then "cast" it to the active Kodi client. The Kodi client will then play it directly from the server, no video data is going through the casting device.
Cool.. Im gonna try that sometime