LG WebOS TVs unable to change audio/subtitle tracks

Hi there!

For the last few weeks my users and I have been experiencing a problem, where LG WebOS TVs (both older and newer) are unable to switch between audio and subtitle tracks. Track change modal comes up, I select another track, nothing happens, back out of the modal, and it’s playing the same track as before. This is only happening on LG TVs - Samsung Tizen, Android, Windows dekstop apps all work fine.

Plex Server: 1.25.2.5319
Running the official pms-docker image on Ubuntu 20.04 and also using Traefik.

TV: 55UJ6307-ZA
webOS: 3.9.0-62906
Plex: 5.29.1

TV: 55UM7450PLA
webOS: 4.9.3-5390409
Plex: 5.29.1

TV: OLED55C11LB
webOS: 6.2.0-27
Plex: 5.29.1

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Anyone else experiencing this?

LG OLED65C14LB last update On TV and Server Plex (ubuntu 20.04), Official region Ukraine.
We also faced a problem with the choice of an audio track, it is also selected in the menu, but the track is produced 1 as it was in the MKV container. on other devices iPad phone, samsung TV? there are no such problems, the track that is selected is produced.

Are you also using Traefik by chance?

I’m having the same issue but only on certain files.

TV: OLED55C12LA
Plex serrver on linux: 1.25.4.5468-989df2310

For example, with a 2 audio tracks, one True DTS-HD and the other AAC, only the second one plays even if the first is selected.

After some some search, I discovered that the LG TVs don’t support DTS (no passthrough via EArc o spdif).
It’s possible to disable DTS support in the Plex app options, but then the server transcodes dts to ac3. It’s ok if the plex server runs on powerful hardware. Otherwise the file must be manually recoded.

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