[Issue]: RTSP Handshake Error 104 if trying to start a game

[Mannshoch]

Describe the bug

Connected over Wireguard ( rethinkdns.com )
Connecting sunshine was no Problem.
Connection Test not sucessfull because of closed Ports. RTSP Handshake Error 104

I never had Problems with closed Ports on Android.
Moonlight on Kodi works without Problem with Sunshine.

Steps to reproduce

1. Connect to Sunshine
2. Enter Pin
3. See Apps
4. Connect an app
5. RTSP Handshake Error 104
6. The Game is starting on the Server

Affected games

I assume it is not game related

Other Moonlight clients

PC

Moonlight adjusted settings

No

Moonlight adjusted settings (please complete the following information)

Moonlight default settings

Yes

Gamepad-related connection issue

No

Gamepad-related input issue

No

Gamepad-related streaming issue

Yes

Android version

13 / lineageos 20

Device model

Samsung Galaxy S10 and Pixel5

Server PC OS version

Kubuntu 24.04

Server PC GeForce Experience version

Server PC Nvidia GPU driver version

AMD

Server PC antivirus and firewall software

no

Screenshots

No response

Relevant log output

No response

Additional context

No response