Same here. Upon entering the Skrag Caves the first boss seems like one monster, until he moves then you see the two monsters in the same spot. After defeating all his guards you are not able to fight him. It still says that you have to defeat all his guards, but there aren't any.

We are already aware of this issue and are in process of fixing. We really do apologize for any inconvenience this has caused. And thank you for letting us know!