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Very little information to go with. So I have to make some assumptions. I assume the robot starts to rotate immediately after setting the goal and the goal you set is in the free space and the robot is not too close to any obstacle/wall. This behavior could very well be a problem with Gazebo (if you are using gazebo) simulator generating spurious laser returns near the robot.

If this is your scenario, the best way is to visualize your laser data and local costmap in Rviz and see if the simulation generates these noise. I faced this several times and one solution is to reduce the frequency of the laser in the urdf specification.