escape velocity robot behavior move_base

Hi all, I have a small doubt regarding the robot's behavior when escape velocity (`escape_vel`) is given to it. When the robot is going in the backward direction (escape_vel : -0.2) to escape from a stuck situation, does the `move_base` consider that there might be an obstacle behind it by looking at the costmap? In my case, it does not care if there is an obstacle behind it or not and it keeps on going in the backward direction and hits the obstacle although the obstacles are present in the costmap. Thanks in advance. Naman Kumar