Widgets turns pure white when in world mode -UE4-27

Hello,

I am using UE 4.27 and have a simple widget with a white text over a blue button and a blue triangle.

If I set the widget in screen space everything works great, but if I set it in world space, it gets full white and I cannot see the text or button. The alpha is respected but everything else is like getting a flat white color. I saw that it gets the 3DWidgetPassThrough material, but in the base color it gets a full white constant and I cannot get it to feed with the widget.

Is this suppose to happen or is it a bug. I watched some tutorials where the color did pass through but was washed out due to the influence of 3D lights and shadows, but here everything gets fully white.

Can you help me?

Thank you.