Really it seems to be fixed. I tried it a few days ago and the issue was still present - my screen froze when I was switching “Night Light” to On/Off a few times over the top right popup menu in Ubuntu 24.04.
Now I’m not able to reproduce it.
Tested with nVidia driver 560.35.03, Ubuntu 24.04.1 LTS, under Wayland. HW: MSI NVIDIA GeForce RTX 4060