Black Crow Map Boss unkillable (Bug Report ID: #2111272706)

As the title states, the Black Crow map boss is unkillable.

I got his health to 50% then I was unable to target him or do any damage at all. I tried all my abilities. Even my mirage archer just stood there like there was nothing there and usually the archer is very aggressive at finding and attacking targets.

This was in the map Blooming Field.

...and now I have to wait 15 minutes for the instance to expire. I tried logging out and back in and it just put me back in the boss room.

Same goes happened to me just now.

Wasted a run and exp along with the loots i left before going inside.

Hope they can fix the issue ASAP.