Jamanra in Copper Citadel - Something is wrong

Does this fight have some new spear ability in Phase 1? During campaign, when boss is about to throw spear, I could dodge to its back and not get hit. In copper citadel, the spear is either bugged or ability works differently?

As soon as it is about to throw spear, I dodge roll to its back. The boss is still facing away from me at Doryani but spear is thrown on its back at me.

I died to same BS 3 times in a row. I went in with no negative map modifiers. WTF..If the fight is intended to work this way in Copper Citadel, then GGG its GG :-)