obstacle add from voxel_layer cannot clear

edit

I am trying to test the obstacle avoid in my robot, I am using a laserscan and a pointcloud2 sensors to get the information of the obstacles, they add the obstacles right in the 2d visualization, the obstacle added from laser can clear automatically, but the obstacle add from the 3D depth sensor can't clear automatically. Anyone encounter this problem? Any suggests?

here is navigation configure(move_base) :

local_costmap_params.yaml

local_costmap:     
   global_frame: /odom
   robot_base_frame: /base_link 
   update_frequency: 3
   publish_frequency: 3
   static_map: false
   rolling_window: true
   width: 6.0
   height: 6.0
   resolution: 0.025
   transform_tolerance: 1.0
   map_type: costmap

   #static_layer:
     #enabled: false



      plugins:
        - {name: obstacle_layer,  type:

 "costmap_2d::ObstacleLayer"}
    - {name: voxel_layer, type: "costmap_2d::VoxelLayer"}
    - {name: inflation_layer,   type: "costmap_2d::InflationLayer"}

global_costmap_params.yaml

  global_costmap:
   global_frame: /map
   robot_base_frame: /base_link    
   update_frequency: 3
   publish_frequency: 0.2
   static_map: true
   rolling_window: false
   resolution: 0.025
   transform_tolerance: 1.0
   map_type: costmap
   static_layer:
        enabled: false

costmap_common_params.yaml

inflation_layer:
  cost_scaling_factor: 0.5  
  inflation_radius: 0.35 #0.45
  robot_radius: 0.35

obstacle_layer:
  obstacle_range: 2.5
  raytrace_range: 3.0
  max_obstacle_height: 1.6 #1.3
  min_obstacle_height: 0.03
  observation_sources: scan
  scan: {data_type: LaserScan, topic: /scan, marking: true, clearing: true, expected_update_rate: 0, inf_is_valid: true}

voxel_layer:
  enabled: true
  origin_z: 0.0
  z_resolution: 0.05
  z_voxels: 10
  unknown_threshold: 0
  #mark_threshold: 2
  publish_voxel_map: true
  combination_method: 1
  observation_sources: output_points  # from the 3D depth sensor
  output_points:
    data_type: PointCloud2
    topic: /output_points
    marking: true
    clearing: true
    obstacle_range: 1.90
    raytrace_range: 2.00
    min_obstacle_height: 0.00
    max_obstacle_height: 3.00
    mark_threshold: 3
    observation_persistence: 2.0