Enormous mouse cursor on canvas after Fedora 43 upgrade

This is almost certainly a new GTK4 bug.

Summary:

On my primary display, which runs at 3840x2160 and 2x scale, the cursor over the main canvas is now extremely large:

his only occurs when mousing over the canvas. Other UI elements don't show this problem.

Steps to reproduce:

• open Inkscape on Fedora 43
• move mouse over canvas

What happened?

• very large cursor

What should have happened?

• normal sized cursor, like when over any other UI

Version info

Inkscape 1.5-dev (bb0b2e461b, 2025-10-28)

                  Compile  (Run)
GLib version:     2.86.0
GTK version:      4.20.2 (4.20.2)
glibmm version:   2.84.0
gtkmm version:    4.20.0
libxml2 version:  2.12.10
libxslt version:  1.1.43
Cairo version:    1.18.4 (1.18.4)
Pango version:    1.57.0 (1.57.0)
HarfBuzz version: 11.5.1 (11.5.1)
Poppler version:  25.07.0

OS version:       Fedora Linux 43 (Workstation Edition)