][1]
This is with metallic 0.2, specular 1, and roughness 0.3xxx. Can’t go fully reflective though, as the real life material also reflects light in that way
See here : Redirect Notice
Also, dark grey didn’t produce that much of a difference ( the issue still exists )
Oh and what’s the use of reflection capture things anyway? Are they mandatory in near every reflective material to implement GI?