lg (Webos) plays movie Ssubtitles out of sync issue

[tuziguai]

This article uses an online translation, forgive my English.

jellyfin server：10.9.7  win10 64bit installer
jellyfin client: webos 1.22
lg cx，webos 5.5.0
Test movie directory D:\test-movie
Test movie file name: video.mkv, video.srt

The video.mkv is not video transcoded, the audio DTS is converted to AAC, and the subtitles are not burned-in
When playing on LG TV, after randomly fast-forward or rewinding a few times, the subtitles and video/audio will be out of sync
Here are my playback logs, I deleted all the logs before playing, and then started playing the movie, exited the TV player immediately after the problem, and then exited the jellyfin server, and finally got three log files, which have been uploaded
Please help, thanks.

log_20240713.log    https://pastebin.com/TENE20Nh
FFmpeg.DirectStream-2024-07-13_10-17-26_4cd01a50baffc66f92c5ef81394df97a_c910d536.log    https://pastebin.com/e1aYGNTv
FFmpeg.DirectStream-2024-07-13_10-17-18_4cd01a50baffc66f92c5ef81394df97a_80bd181f.log    https://pastebin.com/rp0rsxEC

[TheDreadPirate]

In the Jellyfin app on the TV, Settings > Playback (not the one in the dashboard), uncheck "prefer fmp4".

[tuziguai]

first thx

I took the same approach this time as last time, including deleting all log files, unchecking "prefer fmp4......", exiting（sign out） the client and re-entering, but subtitle is still out of sync. I re-uploaded the three log files.

log_20240713.log    https://pastebin.com/Wu5YADCb
FFmpeg.DirectStream-2024-07-13_11-22-11_4cd01a50baffc66f92c5ef81394df97a_cca4b9be.log    https://pastebin.com/0nYLUzau
FFmpeg.DirectStream-2024-07-13_11-22-02_4cd01a50baffc66f92c5ef81394df97a_0e4a5bc0.log    https://pastebin.com/tD6CcM01