I had to use X11 before because using Wayland introduced many bugs (like freezing of some popups and the bottom tray). With updating to Fedora 40, Wayland became the default, which, again, caused many bugs mostly in electron apps (discord) a I wasn’t able to play a minecraft modpack because the whole screen was flickering. But after installing the nvidia driver 555 (still in beta at that time), everythings runs smoothly.