Jellyfin-ExoPlayer stuttering

[jibril45]

Hello, i have an issue with Video Playback on my FireTv Cube 2nd Gen. Everytime i play a movie with DTS Audio, the video keeps stuttering. The Audio itself seems to be fine.
Here's my setup:

-Jellyfin Server is an Ubuntu LXC Container on my Proxmox 8.2
-Proxmox Specs: 16Gb DDR3L, CPU: Intel J3455 (iGPU)
-Jellyfin Server Version: 10.9.7
-Hardware Acceleration is configured (QSV)
-Playback device: FireTV Cube 2nd Gen.[attachment=3977][attachment=3977][attachment=3977]
-FireTv audio settings: Best available
-Audio Passthrough from my Philipps TV (65PUS7855/12) to my Logitech Z906 (TOSLINK cable)
-Jellyfin Client Version 0.16.11
-DirectPlay is enabled (DTS and DD)

Whenever i try to play a larger Movie file with DTS, the video starts stuttering (No error Message). However when i try watching an anime epsiode with DTS, it works flawless.
I also tired playing a larger video file with DTS-HD. I expected it not to work, but it worked perfectly.
When i switch the player to libVLC the audio gets downmixed to Stereo, but atleast it works without stuttering. I also tried other Players like "Just Player". Same there.

I don't know if it is an incompatibility problem between my firetv and my media file.

I'm sorry for my poor english, it is not my native language.

Thank You in Advance

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