Reflections and splines


I have a question about reflection captures and spline meshes, it seems they do not reflect i windows at all.

So I created road with spline, and also have like cables and stuff also splines, but none of it is reflecting, only static, character and lights, as for the road it’s sad, because it reflects the landscape underneath the road spline, so I am thinking is there a setting in unreal to enable to make that reflect or should I turn all splines into static meshes after created?

Any guide, anyone?

Many thanks