Main monitor wallpaper replaced with complete black on the lock screen after some time

Affected version

Fedora 33, Wayland, gnome-shell-3.38.0-1.fc33.x86_64, mutter-3.38.0-1.fc33.x86_64

AMD RX 580, 2560×1440@144 + 1920×1440@144, everything was fine on Fedora 32 / 3.36.

Steps to reproduce

1. Lock the screen.
2. Wait some time.
3. Move the mouse to show the lock screen.

What happened

Black instead of wallpaper on the main monitor.

Relevant logs, screenshots, screencasts etc.