Can't disable subtitles/closed captions on IPTV stream - iOS mobile app

[syd_reddit]

Hi - I can't disable subtitles on an iPad running Jellyfin Mobile when streaming IPTV.
Have tried Only Forced, None, Smart - makes no difference.

I suspect as it's IPTV stream, it's actually Closed Captions that are being displayed, and there doesn't seem to be a setting to enable or disable CC.

Can anyone assist?

[TheDreadPirate]

Are the subtitles burned in? Or forced? Either one, I'm not sure what can be done.