Surface Cache Transparent Artifact

Hi !

I have been struggling with the Surface Cache Transparent Artifact .
The Problem is that when i import the same meshes(diffrent files) but one with perfect Surface Cache and when i import almost the same mesh (the same dimensions) i got transparent artifacts like in pic.

What could have been causing it? How do i fix it?
Before you ask I did apply scale, i have the same UV, Max Lumen cards, normals are fine,no issue monit when importing to UE5.

the verison of unreal is 5.2.1.

The Picture is from Surface Cache view