Reflection problem

Hello guys!
Maybe my question can be stupid, but i do hope you can help me with it
Here is two images, on the first one the sphere lit by skylight(source type: cubemap)
On the second one i`ve put it inside a level, so my question is, how this is possible, why i get this half-black reflection
Thank you

I believe you turned on option “Lower hemishpere is black” in skylight settings

Just add a reflection capture actor

Thanks a lot! This checkbox was turned on by default