During PCG work, artifacts appear when undoing.

I’ve created a system for spawning actors using PCG , but when I undo during manipulation, I get artifacts like the image. They disappear when I reopen the map, but why do these artifacts occur? I’m using Unreal Engine 5.3.
Honeycam 2023-11-09 10-16-47

Did you ever find a solution for this? I’m having the same issue in 5.3.