Glow and Dark artifacts when building foliage issue

Hey guys, how are you today?
Well, I’m using UE 4.24.3, my scene was exported from Sketchup using Datasmith and until here is everything ok!
The issue is when I build my foliage that I place in my wall (to make a Green Wall :smiley: ) and those artifacts comes up.
I’ve searched here, there and youtube but nothing solved this.
The weird thing is that only in the wall it appears. I have some others foliage on the floor but they are ok!

I’m using assets from “Temperate Vegetation: Fern Collection” that I downloaded form the marketplace.

Thanks a lot and sorry if I’m missing informations. This is it!