External monitor loses signal when running Steam game.

[1039-Smooth]

Your system information

• Steam client version (build number or date): Stable Client 1733265492 (Flatpak)
• Distribution (e.g. Ubuntu): Arch Linux x86_64
• Opted into Steam client beta?: [No]
• Have you checked for system updates?: [Yes]
• GPU: NVIDIA GeForce RTX 4060 (Driver version 565.77)/Intel Raptor Lake-S UHD Graphics

Please describe your issue in as much detail as possible:

Using KDE in a Wayland session, running a game through Steam on the built in screen (2560x1600@165hz) works just fine. I connected the laptop to an external monitor (1920x1080@144hz) through an official Steam Deck dock through USB-C/DP and was able to operate the KDE userspace and applications just fine. However when I attempt to display a game from Steam using the NVIDIA GPU, the external monitor loses any signal. I'm able to recreate this with more than one game. I don't believe it is a refresh rate issue because the same issue is present when I set both monitors to 60hz. Both Steam and the game are running through xwayland, and the issue is not present when replicated in an X11 session.

Steps for reproducing this issue:

1. Launch a game on second monitor during Wayland session.