Subtitle display/rendering delay in 10.10.3 w/subtitle extract & webOS client

[Lexx]

• Jellyfin server version : 10.10.3, upgraded earlier today from 10.8.8 successfully.
  
• plugin installed, status active: subtitle extract 4.0.0.0
  
• before playback test, did full library scan with "extract subtitles during library scan" checked on the plugin
  
• Installation method, platform: Windows installer (.exe), Windows 11, not portable method
  
• client: LG Smart TV, webOS TV UN7000PUB, software v. 04.50.90 - googling this, it's webOS 5.0 on LG's site
  
• media being played back: mkv container, two audio tracks - both DTS+ 5.1, default japanese. two subtitle tracks, one set as default. playback is default japanese audio, default sub enabled. video codec HEVC
  
• expected behavior: upon playback start, subtitles displaying
  
• observed behavior: approximately 15 second delay on subtitle playback start.  For clarity: it's not that subtitles are displaying 15 seconds behind the audio/video stream, the subtitles start rendering onscreen 15 seconds after playback begins, - so I lose the first 15 seconds of subtitles.
  
• Current workaround: I wait until subtitles start appearing, then manually drag the playback back to start (not restart, drag it back to start).
  

Note: current IOS App doesn't have same behavior, it renders subtitles from start of playback or if there's a delay it's only a second or two.

I've attached the playback log.  to make things faster this is an excerpt - I restarted the server, used that timestamp, and copied everything from that timestamp forward into the attached text file.

Thanks in advance for the help.  I absolutely love Jellyfin it's been a joy to use.

[TheDreadPirate]

Is your C drive full? It is trying to dump the attachments and fails over and over.