UE5.3.1 LandscapeLayerMaterial. Problem of displaying more than 4 materials

I have a problem with displaying more than 4 materials in LandscapeLayerBlend. I also use masks to import into the Landscape Mode. Has anyone had anything similar?

When the materials contain only albedo - everything is correct

Landscape with all maps added

Masks for import
Mask

In the material - everything is simple