Xbox 360 controllers GUIDE+<some key> fails #191

Describe the Bug

Passing an Xbox 360 from Moonlight to Sunshine fails to pass GUIDE+.
Tested with steam Big Picture mode and pressing GUIDE+X should open the performance overlay.

Tested controllers on moonlight client that fail:

• actual Xbox 360 controller (usb) client -> fails;
• GameSir Nova in xinput mode -> fails;
• Xbox One controller -> fails;

Tested controllers that work:

• GameSir Nova any other mode -> works;
• DualSense -> works;

On the host all controllers work properly.

Both systems are Fedora Silverblue with a custom layer to add all controller support (xpad, xpadneo, xone). Uhid is loaded via Sunshine.

Tested on Sunshine versions:

• Sunshine-2026.1003.171600-1.fc44.x86_64 (beta) -> fails;
• Sunshine-2026.914.233613-1.fc44.x86_64 (stable) -> fails;
• Sunshine-2026.906.222525-1.fc44.x86_64 (stable) -> fails;
• Sunshine-2026.516.143833-1.fc44.x86_64 (stable) -> works;

Stopped working after Sunshine-2026.516.143833-1.fc44.x86_64 (stable).

Expected Behavior

It should work

Additional Context

No response