Samsung Tizen Playback Hangs At Splash Screen

I've spent a week trying to get to the bottom of this and making no progress so time to ask for help. Certain video files played through the Samsung TV just hang at the splash screen and the app becomes unresponsive until force quit.

Client
Samsung UE32N5300 (~2019)
Default Jellyfin.wgt 'Compiled 2026-08-15 4:44' installed using Apps2Samsung

Server
Jellyfin version 10.11.11
Hardware: Ugreen NAS DXP2800
OS: Ugreen OS
Install method: Docker - NOT the App Center version

Steps to reproduce
1. Open Jellyfin Samsung App on the TV
2. Select video file
3. Attempt playback
4. Application displays splash image for the file then freezes with a loading circle of doom infinitely circling the centre of the picture
5. All inputs are unresponsive, client has to be quit and restarted

Certain files refuse to play and crash the client. Alternative files play fine. I have found a pair of very similar files for testing purposes, one plays the other does not. The only difference between the files from MediaInfo is that the playing file is HEVC L4, the file which won't play is HEVC L5.

Both files play fine when played through my PC web browser client.

I have transcoding enabled on the server, I have tried enabling and disabling as many options as I could find researching this online and nothing has made a difference. My current guess is the client is saying the TV supports HEVC L5 when it doesn't.

The unresponsive file does not appear to register on the server log:
[2026-08-15 13:52:30.527 +00:00] [INF] [16] Emby.Server.Implementations.ScheduledTasks.TaskManager: "Update Plugins" Completed after 0 minute(s) and 0 seconds
[2026-08-15 14:01:14.456 +00:00] [INF] [24] Emby.Server.Implementations.HttpServer.WebSocketManager: WS "192.168.50.249" request
[2026-08-15 14:01:49.745 +00:00] [INF] [34] Emby.Server.Implementations.HttpServer.WebSocketManager: WS "192.168.50.100" request
[2026-08-15 14:02:01.833 +00:00] [INF] [24] Jellyfin.Api.Helpers.MediaInfoHelper: User policy for "xxxxx". EnablePlaybackRemuxing: True EnableVideoPlaybackTranscoding: True EnableAudioPlaybackTranscoding: True
[2026-08-15 14:02:01.834 +00:00] [INF] [24] Jellyfin.Api.Helpers.MediaInfoHelper: RemoteClientBitrateLimit: 10000000, RemoteIP: "192.168.50.100", IsInLocalNetwork: True
[2026-08-15 14:03:01.179 +00:00] [INF] [24] Emby.Server.Implementations.HttpServer.WebSocketManager: WS "192.168.50.100" closed
[2026-08-15 14:03:17.015 +00:00] [INF] [36] Emby.Server.Implementations.HttpServer.WebSocketManager: WS "192.168.50.100" request

Looking for any help or advice for steps to try, in particular any way to force the client to request transcoding for HEVC L5?

MediaInfo for the working file:

  Mediainfo Simpsons.jpg (Size: 43.36 KB / Downloads: 1)

MediaInfo for the unresponsive file:

  Mediainfo American Dad.jpg (Size: 42.78 KB / Downloads: 0)