Reflection doesnt work properly

Hi guys,
I have these weird reflection problems and I dont know how to get rid of them. For some kind of reason my reflections go darker the straighter i look onto the surface of my objects.

So in this picture u can see the reflections going comepletely black if i look straight onto the surface.

This is how my scene looks like in the reflection view. Also kinda weird i think.

So I have no idea how to fix this. I was looking up reflections in the ue4 doc but i couldnt find what i did wrong.
I hope you can help me.

Thx, Clank