Well, I fear it's because I gave one of the Cranes (the one on the right) the ability to Raise.
I wanted to give them the ability to work together, but apparently they work together a little too
well. I'd be much appreciated if you could try it out, and I apologize in advance for this- I had thought that I had taken care of these Cranes a long time ago.
EDIT: From what I've been told by one of my testers, the problem is that even when the Crane is supposed to die, it counters with Cure2 on itself, thus making it unable to die. I'm going to create a patch to remedy this. Once again, sorry.