Running session not detected when connected to external network

[Lee-Jinyong]

Is there an existing issue for this?

• I have searched the existing issues

Is your issue described in the documentation?

• I have read the documentation

Is your issue present in the latest beta/pre-release?

This issue is present in the latest pre-release

Describe the Bug

Hello!

I found a problem during a test using Windows 10 and an Android tablet (Lenovo products).

When I pause a session after using an external network, I noticed an error where Moonlight did not recognize the paused session.

The PC button does not show any icons, and it does not show any indication that the session is paused.

When I try to connect again, it works the same as the first time I connect to the session, but I am not able to connect due to a port error.

The problem did not appear when using the internal network.

On the internal network, I can reconnect and shut down the paused session without any problems.

I would appreciate it if you could check and solve the problem.

Expected Behavior

A connection using an external network should show a session pause

The client must be able to reconnect or terminate the pausing session

Additional Context

No response

Host Operating System

Windows

Operating System Version

Windows 10 Pro 22H2, 19045.5371

Architecture

amd64/x86_64

Sunshine commit or version

v2025.118.41713

Package

Windows - installer (recommended)

GPU Type

NVIDIA

GPU Model

GeForce RTX 3080

GPU Driver/Mesa Version

560.94

Capture Method

Desktop Duplication API (Windows)

Config

locale = ko

Apps

{
  "env": {},
  "apps": [
    {
      "name": "Desktop",
      "image-path": "desktop.png"
    },
    {
      "name": "Steam Big Picture",
      "cmd": "steam://open/bigpicture",
      "auto-detach": "true",
      "wait-all": "true",
      "image-path": "steam.png"
    }
  ]
}

Relevant log output

None

[Gaeus]

I can confirm the issue on android moonlight

But I do not encounter the issue on a pc installation of moonlight.

Seems the issue is the android client not seeing the running session.

[Gaeus]

I should mention that both exemples we're in external network.

My laptop's work fine on an external wifi.