In the planning only experiments, the perturbation happens only at the starting waypoint. However, the target plan that the planner comes up with sometimes seems to be further along the way. E.g., testcase-amcl-lidar-sensor-nolights-l32-l4-favor-efficiency-1-nocost-1-fp-c has a starting path of [l32,l33,l34,l8,l3,l4] but the new plan has the path [l32,l34,l8,l3,l4] (i.e., missing l33).