Bug#1058750:

[Behzad Asbahi <behzadasbahi@gmail.com>]

I think the problem is not exactly from GTK4 or I915, but it's from crocus_dri driver from libgl1-mesa-dri package. I temporarily fixed this in my system with editing /etc/environment and adding `MESA_LOADER_DRIVER_OVERRIDE=i915` to the file.