Forward shading problem?

Hello guys, I Hope you’re doing great,
I have little issue that I hope you can help me with,

I enabled forward shading on 4.14 and restarted the engine

and I got this type of image:

I tried rebuilding the light, but I still have exactly the same image.

It used to look like this before enabling forward shading:

I’m such a noob. forward shading doesn’t support shadows from movable lights and my main light source was movable.