Direct Stream not working?

Server Version#: latest public
Player Version#: latest from samsung smart hub

I’ve got a Samsung 4K Smart TV from 2020 and it does not support DTS audio. However it does support the traditional AAC etc.
I just finished installing Plex Media Server (latest at this time of posting, public branch) as well as installed the latest version of Plex Media Player from Samsung app store.

Now I want to play a 4K video file that is in H265 and has 2 audio streams (AAC and DTS) and avoid video transcoding. When I select AAC it plays normally and video and audio appear as Direct play. But when I select DTS, it transcodes both, video and audio.

To my understanding Direct stream is supposed to copy and stream the video as is, while in this case transcode only the audio to something that the tv supports (AAC in this case). So why does it not do that? Or am I misunderstanding something?

Thank you in advance!