Even though WOLF:origin is not in the exposed transforms for that rig doesn't mean it's not part of the rig. Since this node is set as the root node of the rig, it's where root motion is evaluated. Root motion application has changed in 2018.3 to make it more coherent, and as such we no longer discard animation on the root node if Apply Root Motion is turned off.

To reproduce the behaviour of Root curves (Root T and Root Q) with ApplyRootMotion OFF in 2018.3 and following, please turn on Apply Root Motion, and implement OnAnimatorMove like this:

public class RootMotion : MonoBehaviour {
public bool enableRootMotion;
private Animator animator;

private void OnAnimatorMove()
{
if (animator == null)
animator = GetComponent<Animator>();

if (enableRootMotion)
{
animator.ApplyBuiltinRootMotion();
}
}
}