EDIT: Oh my god, sorry, I’m an idiot who forgot that the Jellyfin subtitles setting menu had a save button you needed to press. ALSO, Simultaneously, I posted this earlier than I intended; I thought to myself “OK I’ll try this one last thing and if that doesn’t work then I’ll give up and ask for help”, and then went and wrote this post while I waited for the DVD to rip - and then I went and posted it as soon as I was done writing, without waiting for the one last attempt to finish. It turns out that removing the --subtitle scan flag fixes the problem. So I double shouldn’t have posted this. Sorry for taking up your time, I saw an option to hide this post so I think I’ll be doing that now.