Material not working properly after 4.15 update

Hello, I’m developing a relative big scene, but after I updated to 4.15, I have been facing some issues with my materials, this one in particular. As you can see in the images below, the shaders work great when I’m visualizing it on the ‘‘Asset Editing Window’’. It works as well when I see it on Material Editor. However, when I place it in the world, it loses the mask that I used for adding color. I think it might be my lightning setting, but it used to work very nice in 4.14.

Let me know if can explain a bit more.

Thanks in advance.