We have the Limited non-hybrid model and I have seen the void you are referring to. I have actually seen one from each individual headlight. Looking at the headlight housing, I believe it is caused by the design of the housing. Still not sure on whether that was an intentional design, or an oversight. I have seen some say that it is by design, to limit the light in the eyes of oncoming traffic, which does make sense as I have still been flashed by my fair share of drivers who think I have my brights on.
Fortunately I do not find the void to be distracting or to hinder my ability to see at night, though I can understand others' concerns. Frankly these are the best headlights I have ever had in a vehicle and they light up the road very well. I do travel on some completely dark country roads and they do a great job of allowing me to see everything, even little critters poised to shoot across the road as I approach.