Normal baking corner problem Good evening!

I've looked at other similar topics but none resolved my issue.

The problem is corners after baking normals and applying them to a mesh.

Both cubes have same amount of bevel. 
I have subdivided only 5 large square faces and sculpted them for the High res. cube.

Unwraped with smart UV

What could be the problem?
The problem are the ngons with 124 vertices/edges on the high res cube.



Adding a triangulate modifier to the cube solves that issue.

Also, the front and bottom faces of the low res cube are overlapped in the UV, so you should unwrap it again.