I was recently playing around with autotrack and Mavic was following subject well and responding to movement. May have been the dwindling light conditions or subject moving too fast but the Mavic lost the subject a couple of times. This was all fine until on one occasion it lost the subject and suddenly flew backward and upward at a rate of knots toward some tree obstacles. I took over control and avoided crashing but was concerned that it took off with no warning or self preservation. I think the avoidance collision is disabled in this mode however it took off as though it was going into a RTH routine. Any thoughts?