Corners in overview look wrong

[Fxsch]

Description
In the overview, the wallpaper corners look wrong. It kinda looks like the corners are applied using a mask that is scaled too big, so the corners don't look rounded but cut off.

Without extension:

With extension:

OS and Shell Information
Please provide your OS name and version, GNOME Shell version, and the session type (X11/Wayland).

• OS: Fedora 40
• GNOME Shell: 46
• Session type: Wayland