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1. Is your laser mounted on a mobile platform? If it is mounted low enough, the slight unevenness of the ground will cause the laser to tilt and the beam to be reflected off the ground. You can verify by the laser data by checking it when it is stationary.

2. check if the inflated obstacles are published correctly. if they are not, try checking the local costmap file params yaml file. make sure that the frame are correct. global_frame: /odom robot_base_frame: base_link

hope this helps

1. Is your laser mounted on a mobile platform? If it is mounted low enough, the slight unevenness of the ground will cause the laser to tilt and the beam to be reflected off the ground. You can verify by the laser data by checking it when it is stationary.

2. check if the inflated obstacles are published correctly. if they are not, try checking the local costmap file params yaml file. make sure that the frame frames are correct.