100% metallic material can't handle emissive light

Please see the attached image.
The 2 purple meshes are:

  1. non metallic
  2. full metallic

The lighting it receives is from an emissive material.
The lighting around the corner is a point light to illustrate how it lights both the meshes
but the white emissive light can’t handle 100% metallic. If I set the metallic value to 0.8 it works fine.

Is this normal?