i testing same material with reflection and refraction and realized a few things. The only thing is reflective is direct light and difuse color generated by direct light, the other things like a gi, refraction, emisse nothing is reflected. The refraction is very cool, refracted every thing like reflection, emisse, gi and other, but when you changed the material mode to translucent all channels is disable except refraction and opacity. the other channels like a base color, metalic, roughness and others dont work.