Your system information

• Steam client version (build number or date): 1702079146 (Thu, Dec 7 6:33 PM UTC -08:00)
• Distribution: Gentoo (LLVM & OpenRC)
• Opted into Steam client beta?: No
• Have you checked for system updates?: Yes
• Steam Logs: steam-logs.tar.gz
• GPU: AMD Radeon RX 7800 XT
• Desktop Environment: KDE Plasma 5
• Window Manager: Kwin
• Session Type: Wayland

Please describe your issue in as much detail as possible:

Locking the screen while the Steam client window is open then unlocking the screen causes drop-down menus on the right side of the client and Steam notifications to appear on the left side of the client window.

In my case, this happens to me every time I lock the screen overnight as I don't usually lock my screen for any other reason.

Steps for reproducing this issue:

1. Run a Plasma Wayland session via SDDM
2. Launch Steam
3. Lock the screen (optionally wait overnight, as I do)
4. Unlock the screen
5. Click the notifications button or the account menu drop-down on the top-right of the client / receive a notification