I have already posted about this on the Kodi Forums to see if this is isolated behavior to just the installs of Kodi and LibreELEC I've personally setup but despite over seventy views and waiting two days there have been no responses, so I'm posting here to see if anyone can help.
I am running Kodi via LibreELEC (official) 9.2.6 on a minipc and I checked against this with Kodi 19.1 on Ubuntu 20.04.2 LTS with a new profile on my Lenovo Thinkpad x250 with a clean profile, both demonstrating the same behavior. Here is a log: hastebin
I downloaded some videos from YouTube and scraped the subtitles for the songs. I tested the subs and they display without issue on the videos in VLC. I copied them to the media directory for my Kodi to use and added them to the library. Videos add without issue and play without issue. Even using Party Mode is fine and will play without issue including the subtitles. Where it gets odd is if you run Party mode in Party mode.
Usually this just ends up with a reordered and more random playlist, however with my subtitles I noticed that running Party mode in Party mode results in the video playing but a complete inability to get subtitles to work. Can anyone duplicate this? Is this an actual bug or something resulting from me doing something the system never anticipated?
Thanks in advance for any assistance.