I made an update this morning. Since then, GTK4 windows no longer display correctly. I have the same problem with Gnome software, Nautilus, terminal, gnome-config.
On the other hand, Firefox or Evolution display correctly.
I have the same problem with 2 different Lenovo PCs, one with an AMD card, the other with an Intel video card.
Am I the only one having this problem? Is it due to a regression?