New Uniqe Map "The Silent Cave" bugged

I have just completed the silent cave 3 times now, the first time I went in there I got pooped like a small child, 2nd time I went in I went strait for the boss in the center and killed him, 3rd time I went in I cleared everything and show 0 monsters remain in the top right of my screen, yet in both cases of me clearing the big guy in the middle I cannot complete the map and when I load a new map these nodes come up as failed.

Also I didn't get a skill book for clearing this map.


Don't know if this is just a Xbox issue or if it's happening on several platforms.