Problem with backward loop movement

[_Aka_]

The cause of the issue is that you have two spline segments of length 0, the one between CP2 and CP3, and the one between CP6 and CP7. The controller expect segments with non zero lengths. I will work in the future on this to make controllers either resilient to zero length segments, or at least add a proper error message, but for now, just get rid of these segments and everything should work fine.

Here is your scene, but without the zero length segments

  SimpleReproduce_corrected.zip (Size: 3.66 KB / Downloads: 0)