Operating system: windows 10 1903
Graphics card: 1080ti * 2
Broken: 2.82.7 stable versioin
Short description of error
This issue appears both on eevee and cycles.
While using smooth shading, simply add a bump map and the shading lookes flattened.
This problem will occur on a high poly model if the camera is close enough.
Exact steps for others to reproduce the error
Bevel the cube with several segments and simply plug a bump map to the normal port of the shader node.