"Why isn't the stabilize tracker staying in place"? After Effects Tutorial 

In this tutorial we overcome motion tracking a subject that changes size and shape. The auto stabilize tracker veers off the subject as the drone. So to descends. To solve this issue we are going to break it down into three separate stabilize trackers: His sunglasses, his body and the top of his head. To achieve this we will be using null objects and pre-comps to stack the three tracks together.