Apple TV App cannot connect via DDNS on port 8096, while iOS app and browsers work

[famarch 0]

Hello,

I am seeing a reproducible issue with the Apple TV app and would like to clarify whether this is a known problem or a bug.

My Emby server is reachable externally via DDNS on port 8096.

What works:
- access via Safari and other web browsers using the DDNS address
- access via the iPhone/iOS Emby app using the same DDNS address

What does not work:
- access via the Apple TV Emby app using the same DDNS address

So the basic pattern is:
DDNS + port 8096 works in browser and iOS app, but not in the Apple TV app.

My question is:
Is there a known issue with the Apple TV app regarding external connections via DDNS and port 8096, especially compared to Safari and the iOS app?

I would also like to know whether the Apple TV app handles DDNS, IPv4/IPv6, or external HTTP connections differently from the iOS app and browser access.

Thanks.

appleTV: A2169, tvos 26.4

emby app on tvOS latest version