Cost Map Problem in Spatio Temporal Voxel Layer

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Hello.

I am using the STVL(Spatio Temporal Voxel Layer) layer as the obstacle layer. Currently I can see outputs actively in the project. My goal is to allow my robot to easily pass through empty objects such as tables. It sees the table in the RVIZ environment and puts the costmap block there. However, the back of the table creates a complete cost map. I couldn't understand this part. I don't want this to happen. Because I can move my robot to the other side of the table with SLAM. What can I do for it?