Honestly, I throw my crows two handed so I don't think that is the real issue here. It might help to drop your front hand, but leaving two hands on the handle is also good to give you some strength on the landing.
The real issue to me is your pop. It really looks to be like the 180 is trying to come around (look at screen shot) but doesn't have enough time to do so. Really focus on going up first before you start flipping. I bet that will solve your problem.