Connection terminated immediately after connecting by IPV6 WAN

[RagnarosXD]

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 nightly release?

• This issue is present in the nightly release

Describe the Bug

My connection terminated immediately after connecting to the remote computer. I checked possbile two problem( ping/virtual sink audio devices), but seems the problem i faced is different.
The problem was occured only on Windows platform and using ipv6 WAN. I have tried different devices and net work, only this particular combien have problem, please check below picture

Expected Behavior

It is really strange, through different combination test, I think there is no problem with my network or devices, but the problem has actually occurred.
This problem has been bugging me for a long time and I'd really appreciate any information or help.

Additional Context

No response

Host Operating System

Windows

Operating System Version

Windwos 11 22H2

Architecture

64 bit

Sunshine commit or version

0.21.0

Package

Windows - installer

GPU Type

Nvidia

GPU Model

RTX 3070 Notebook

GPU Driver/Mesa Version

537.42

Capture Method (Linux Only)

No response

Config

upnp = enabled
address_family = both
ping_timeout = 20000

Apps

No response

Relevant log output

[2023:10:31:20:58:11]: Info: Capture format [DXGI_FORMAT_B8G8R8A8_UNORM]
[2023:10:31:20:58:11]: Info: SDR color coding [Rec. 601]
[2023:10:31:20:58:11]: Info: Color depth: 8-bit
[2023:10:31:20:58:11]: Info: Color range: [MPEG]
[2023:10:31:20:58:12]: Info: NvEnc: created encoder P1 two-pass rfi
[2023:10:31:20:58:12]: Warning: QOSAddSocketToFlow() failed: 1168
[2023:10:31:21:07:26]: Info: CLIENT DISCONNECTED

[NukedBart]

replicated on ipv4 lan, using software encoder, 1600x900 resolution

[Ravnger]

@RagnarosXD When you try to connect, do you see anything similar to this in the logs?
"Warning: Rejected connection from [::xxx:xxx.xxx.xxx.xxx]: it's not properly set up"
I also get an occational "Warning: QOSAddSocketToFlow() failed: 1168" error.

I've seen this issue mentioned in the Moonlight github sector as well.

[maxim-saplin]

Up, still present

#2120 (comment)