Samsung 2021 TV here. Bit the bullet and rolled back to 1.24.5.5173. No more issues with the sound 
I have been watching this thread since running into this problem in december 2021 and i am shocked how this is handled by plex. There are paying customers who can not use the product anymore and are required to use an older version with unfixed security vulnerabilities and you fail to even officially acknowledge the issue.
All this while not even having a proper issue tracker and handling things like itâs 2010 in a community forum with tags.
I started using plex because my new Samsung tv wonât run Kodi and i even considered buying the lifetime pass, but this right here makes me rather stick a fire tv into my set.
This is really sad.
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Same problem here on a Samsung TV:
PMS: 1.25.8.5621
Samsung TV 2018 NOK 
LG OLED55B8 OK 
Xiaomi mi box s OK
The plex server is not on the TVâs local network.
Tested on DTS-HD MA and DTS sound files â player loading, then error message.
Uncheck âallow direct playâ and âallow direct streamâ â Still cannot play
Apparently, reverting to an earlier version of PMS (1.24.5.5173) would solve the problem but it is not a permanent solution.
Still waiting for a fix âŠ
Sad 
Does anyone have an explanation of what happened ?
Samsung TVs do not support DTS and previously PMS transcoded the audio to compensate for this.
Why does PMS not transcode DTS anymore ?
Florian
4+ weeks without any updates for a confirmed issue which affects so many⊠calling it bad customer support would be a massive understatement.
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Plex isnât know for having good customer service. What they are know for is constantly pushing crap people donât actually want such as tidal etcâŠ.
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Any luck?
Not yet, I was still having issues on Thursday.
Itâs been almost 4 months now, so I assume itâs not getting fixed anytime soon. I told my friend to buy a Roku stick. Hopefully they donât drop the ball there as well.
Just FYI, Roku has different issues: Movies with DTS are stuttering on latest Roku Ultra 2020 - #69 by Diab
Disabling Direct Play as a workaround seems to work though.
Haha, damn, canât win.
The roku streaming stick seems to be alright so far tho. My sister has one and hasnât had any issues yet. I guess weâll see when my friend gets his.
OP here.
Just stepping by to say that after all the waiting and hope that Plex were gonna take some steps to take some responsibility for their really important customers (come on, nobody cares of your streaming b^â â â â services, face it) I went the KODI way. End of story. Happy with it.
My kids were every day asking me âDaddy, why is my audio disappearing?â
What the f*, Plex?! What are you taking money for?
The last 4-5 months there were a lot of upgrades for server, android app, samsung tv app etc. with a lots of MINOR issues which nobody cares of!
Iâm sorry but⊠well⊠another pissed off customer who gave you my money!
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This is just one of the many issues with Plex that are in dire need of attention, but are seemingly ignored in favour of constant UI tweaks and adding mountains of rubbish streaming content. Iâm following you out of the door.
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Has anyone tried unchecking âAllow Direct Playâ and âAllow Direct Streamâ and seeing if that avoids the issue? That worked for me.
Mate, are you aware that this is actually relying on server transcoding power? Did you try this with 4k movie e.g.?
Can you read the thread up and see what is really going on?
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Yes Iâm aware, thanks.
Changing direct play settings has no effect here
Plex is already trying to transcode DTS to AAC, it just keeps failing with the current server version
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Samsung AU9000 (2021) with a Samsung soundbar via HDMI ARC which has a DTS:X mode and DTS support, yet still facing the same issue of it transcoding audio anyway with the workaround being to select a different resolution, forcing the server to transcode.
Obviously this isnât a real solution as it means transcoding 4k content to 1080p for playback on a 4k TV, or 720p to SD which looks awful on said 4k display. Forcing transcodes for local devices that should support the content means unnecessary power use for my server, never mind the pain of trying to get my family to remember to change resolution on everything they watchâŠ
As others have mentioned itâs an intermittent issue, sometimes happening within minutes or in some cases over an hour into a movie.
Tested this on multiple devices within the same household over wired and Wi-Fi, only thing Iâve not yet tried is using a Roku/Fire TV/Shield to bypass the app as the whole point of getting this TV was to consolidate our media devices.
Last thing left try is setting the TV to Passthrough mode rather than PCM/Auto for audio, but Iâm doubtful this will work. Just need an hour where I can leave the TV playing without annoying everyone.
Just discovered this issue myself and can confirm that direct play video alongside DTS transcode on my Samsung TVs (both of them) results in intermittent audio (usually cuts out in roughly the same spots).
Iâm hosting my PMS on a trueNAS server (as a plug in not a home rolled jail) so I havenât figured out how to roll back to test 5173 
updating to the latest version didnât change anything, and my i3 canât handle transcoding 4k video so disabling direct play is not really an option for me.
Been having the same issue on my Q90A for the last few months as well. The only fix is reverting back to 1.24.
Not a single feedback from Plex on this problem⊠Thatâs garbage, thatâs total garbage.
No possibility to contact the support to make things move, or at least, to have a feedback from Plex which explains that they take into account the problem and work on its resolution.
We paid for a service that degrades over time and Plex doesnât care⊠Cash cow!
Letâs get them on Twitter to try and get things moving⊠At this rate, we will still be at the same point in 2040
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Itâs frustrating to not even know if Plex knows itâs an issue. From what I can tell, we just have to hope and pray they see the forum posts. Iâve been watching this thread for a while, hopefully the increased activity means increased visibility; but thatâs just a hope.
