Hi !
I’m new on Unreal so i’m sorry if it’s a dumb problem / question …
I’m trying to make a room with modular pieces ( Wall / Door / Wall with windows / Ground … )
I have place all piece in my scene with the magnet activate.
Without light or with a directionnal light and a sky, i have the same result.
As you can see, i have some light / shadow problem on the the wall top.
I think it’s not the light because i have the same problem without any light 
Some screens for help :
