U3425WE, KVM work slow

I bought the U3425WE monitor because of the kvm. I connected pc1 - thunderbolt, pc2 - HDMI with USB-C but unfortunately the KVM works very slowly. I have an image divided by 50% between laptops and I wanted to switch smoothly between them, but the time needed to switch is 5 seconds, which is very inconvenient for me. I was encouraged to buy it by videos on YouTube where the transition works smoothly. I downloaded all the latest drivers but nothing helped, please help. How long should it take for KVM to switch normally after moving the mouse to another screen?