Help, Material Layer Blend stopped working

Got My layer Blend set up to Blend 1 dynamic Material(Height and Angel) and 6 other layers, that make the same material (All weight blended),
all using Material Functions.

**It’s working great!
**

Now, every time I try to add another layer to the Layer Blend or change the Material Function to change the materials make any one of the layers, I don’t see any layers while I paint them on the Level Terrain.

I tried deleting all Paint Layers and start painting all over again but no matter what I do,
once I add another layer or change the material Function composition (Like adding another lerp to it and blend it with another material) nothing is showing up after I apply the paint.

Any thoughts?

Anyone can help?