Main OS (20260526.1000): QAM serious bug

[Falkentyne1]

Your system information

• Steam client version: Stable
• SteamOS version: 3.9
• Opted into Steam client beta?: [No]
• Opted into SteamOS beta?: [Yes-MAIN]
• Have you checked for updates in Settings > System?: [Yes]

Please describe your issue in as much detail as possible:

Describe what you expected should happen and what did happen.

New main build on main channel has a QAM bug.
Pressing the QAM causes the mouse cursor to appear and mouse input is 'activated' at the 'inactive' point.
This causes some games to instantly act like the mouse is moved and the view will snap to that location.
No problem before this build. Normal behavior is: QAM should appear WITHOUT acting like a mouse was activated!

Steps for reproducing this issue:

1. Launch a game that either has full 3d movement (Elden Ring) or supports both mouse and gamepad (e.g. Sektori)
2. Press QAM
3. Watch view snap to mouse point or cursor appear. Pressing QAM should NOT act like a mouse input.

[matte-schwartz]

I can reproduce the issue here in Elden Ring on a Legion Go 2, looking into it. Seems broken on Main but not on 3.8.6 at the moment.