Plex not activating subs per Language Preferences

Server Version#: 1.43.0.10492
Player Version#: 4.159.0

This is a brand-new server install, but the Plex Account itself has been configured for some time with very normal English speaker prefs:

Screenshot 2026-04-03 at 18-25-53 Plex

But these don’t seem to be working at all.

I’ve only made a single test library at this point, but the subs are not being activated at all without me manually turning them on.

The audio/sub tracks are flagged correctly for languages.

So why aren’t the English subs being turned on here?

Do you have the checkbox selected shown in the below screenshot?

-Shark2k

One additional note:
Your screenshot shows you’ve selected to display English forced subtitles. However, the file only lists the regular subtitles (no forced track).

Not correct. I have the same setting and my full English subtitles are selected either when the media only has a foreign audio track or if I select the foreign audio track when there is an English track available.

Also, forced subtitles are selected when the audio track and subtitle track (labeled forced) match. That would not apply in this case.

-Shark2k

Yup, I do.

Also, I will note this is the official Plex Docker image (not linuxserver.io).

Edit: I hadn’t checked programs that have forced subs, so I just now added additional content to the test library. It doesn’t appear forced subs are being selected either.