Skinned Mesh Render and Mesh Renderer have different results with same shader

I’m not sure if this is a bug. I’m using unity 2018.1.0b10.
I’ve made a simple fresnel shader using Amplify Shader editor, and i get two different results with the different types of renderers.

The workaround I found after a while was that you have to change your import normal options to area and angle weighted on your skinned mesh