Tracker fails to track objects that are close to each other but distinct from another

[vsaw]

Looking at the following Darknet JSON Stream, the one can see that darknet detects two persons close to each other, yet clearly distinct from another. The tracker however merges both objects into one, thus erasing one object from the scene.

{
 "frame_id":1137132, 
 "objects": [ 
  {"class_id":0, "name":"person", "relative_coordinates":{"center_x":0.447100, "center_y":0.315462, "width":0.033928, "height":0.115056}, "confidence":0.670621}, 
  {"class_id":0, "name":"person", "relative_coordinates":{"center_x":0.472682, "center_y":0.296385, "width":0.028619, "height":0.118678}, "confidence":0.289695}
 ] 
}, 
{
 "frame_id":1137133, 
 "objects": [ 
  {"class_id":0, "name":"person", "relative_coordinates":{"center_x":0.447339, "center_y":0.313765, "width":0.035581, "height":0.126710}, "confidence":0.582253}, 
  {"class_id":0, "name":"person", "relative_coordinates":{"center_x":0.471141, "center_y":0.292986, "width":0.028312, "height":0.126107}, "confidence":0.308533}
 ] 
}, 
{
 "frame_id":1137134, 
 "objects": [ 
  {"class_id":0, "name":"person", "relative_coordinates":{"center_x":0.452491, "center_y":0.302588, "width":0.030738, "height":0.136299}, "confidence":0.546889}, 
  {"class_id":0, "name":"person", "relative_coordinates":{"center_x":0.469706, "center_y":0.294295, "width":0.027532, "height":0.124118}, "confidence":0.533913}
 ] 
}