For some reason GPU Lightmass is not working correctly with Volumetric Lightmap, as you can see on the image, the movable objects are receiveing incorrect lighting.
I can’t even fix it by decreasing the Volumetric Lightmap Detail Cell Size
And I have everything setup in the scene, Lightmass Importance Volume and so on.
Volumetric Lightmap Detail Cell Size at 200 (Standard Value)
Volumetric Lightmap Detail Cell Size at 16