My device:
OS: Arch Linux
Kernel: x86_64 Linux 6.18.9-arch1-2
DE: KDE 6.6
WM: KWin Wayland
CPU: Intel Core i9-14900HX
GPU: NVIDIA GeForce RTX 5060 Laptop
In my device, the kwin effects with any transparent function such as fading popup and fade in/out animation doesn’t play a role. If I try to use them, it seem like a window frozen here without any transparency change, and when timer goes, the window just disappear. The issue also exists in popup(overlay with each other)

So could I fix it? The gif just in fading popup effects and the popup just appear suddenly and disappear suddenly without Transition. I think it isn’t normal, and before I upgrade, it didn’t render like such problems.