FaceTime window jumps to unwanted position at start of call

Running FaceTime 3.0 on MacOSX 10.10.1, there's an annoying behavior that I can't seem to change:

When I first get an incoming call, the FaceTime window jumps to the far right of my rightmost display (an external 30" Cinema display), and can't be repositioned until the call is fully connected (at which point I need to move it more than a yard to the left to center it with the camera in the MacBook Pro).

Why can't the window just stay where I put it?