Hi Andrew,
I’m having the exact same problem! (Even though two and a half years have gone by, it’s apparently not fixed.)
In After Effects CC, I used the 3D camera tracker, brought it into Cinema 4D R18, and I’m seeing the wild movements in some physical motion blur frames.
Below is a screengrab of an example:

These boxes are falling downward, so most of the frames have a slight vertical blur, but you can see the crazy radial smear in this frame, among a few others.
Has anyone found a workaround?
I’ll look at Adam’s comment again, and in the meantime maybe check for a post in the AE forum.
Best,
Phil
___
philbolles.com