Lookout Arena rare monsters fracture into more rare monsters

As title says, I had Lookout map rare monsters in the boss room before the actual map boss with fracture mod on them and on kill they fractured into more rare monsters as shown in the picture. Not sure if they granted experience but definitely gave charges for flasks and to light poacher.

Another picture of this:


Edit: Added another picture that somewhat proves it happens always if you find them as fractured. (Also better picture of them)