Dynamic lighting on object that scales from .001 to 1.0?

I’m animating the scale of objects in 3dsmax from .001 to 1.0 (since .fbx can’t handle visibility track). The geometry is working fine in UE4, but lighting is not. How can I assure that the lighting is being calculated dynamically on the objects as they scale from virturally nothing to full size? Right now, the direct shadows of the object onto the ground look correct, but the GI looks horribly wrong. I’ve set both lights (sky and directional) to movable.