Malformed XML error when trying to connect after a previous session

[planet]

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?

None

Describe the Bug

I get some "Malformed XML" error when trying to connect to Sunshine using the Moonlight client. This only happens after connect again after a previous session. i.e. it does not happen off a fresh restart but only intermittently after a previous session.

The only way to fix this issue is to restart Sunshine. Any ideas?
I can provide more logs the next time it happens but it has happened many times to me already. Happens on the latest beta version as well as the normal version.

Expected Behavior

No response

Additional Context

No response

Host Operating System

Docker

Operating System Version

Windows 11 (Build 26100.4349

Architecture

amd64/x86_64

Sunshine commit or version

v2025.122.141614

Package

Windows - installer (recommended)

GPU Type

NVIDIA

GPU Model

5090

GPU Driver/Mesa Version

576.80

Capture Method

Windows.Graphics.Capture (Windows)

Config

encoder = nvenc
nvenc_realtime_hags = disabled
output_name = {9acddf6d-43cc-576e-9aff-0c5fc80b4cc8}
sunshine_name = Sunshine

Apps

Relevant log output

Will provide this later.