cannot hit scenery tennis

Project/Assets/ML-Agents/Examples/Tennis/Scenes/Tennis.unity

       propertyPath: m_Name
       value: TennisArea (1)
       objectReference: {fileID: 0}
+    - target: {fileID: 1541947554534326, guid: 812997c7bc2544b6f927ff684c03450f, type: 3}
+      propertyPath: m_IsActive
+      value: 1
+      objectReference: {fileID: 0}
     - target: {fileID: 4172342666475122, guid: 812997c7bc2544b6f927ff684c03450f, type: 3}
       propertyPath: m_LocalPosition.x
       value: -60

Project/Assets/ML-Agents/Examples/Tennis/Scripts/HitWall.cs

 
     void OnCollisionEnter(Collision collision)
     {
-        if (collision.gameObject.CompareTag("iWall"))
+        if (collision.gameObject.name == "Scenery")
+        {
+            Reset();    
+        }
+        else if (collision.gameObject.CompareTag("iWall"))
         {
             if (collision.gameObject.name == "wallA")
             {

Project/Assets/ML-Agents/Examples/Tennis/Scripts/TennisAgent.cs

         Quaternion deltaRotation = Quaternion.Euler(zAxis * rotateZ);
         m_AgentRb.MoveRotation(m_AgentRb.rotation * deltaRotation);
 
-        if (invertX && transform.position.x - transform.parent.transform.position.x < -m_InvertMult * 5f ||
-            !invertX && transform.position.x - transform.parent.transform.position.x > -m_InvertMult * 5f)
+        if (invertX && transform.position.x - transform.parent.transform.position.x < -m_InvertMult * 3f ||
+            !invertX && transform.position.x - transform.parent.transform.position.x > -m_InvertMult * 3f)
-            transform.position = new Vector3(-m_InvertMult * 5f + transform.parent.transform.position.x,
+            transform.position = new Vector3(-m_InvertMult * 3f + transform.parent.transform.position.x,
                 transform.position.y,
                 transform.position.z);
         }

config/ppo/Tennis.yaml

 behaviors:
   Tennis:
     trainer: ppo
-    batch_size: 4096
-    buffer_size: 40960
+    batch_size: 2048
+    buffer_size: 20480
     beta: 0.02
     epsilon: 0.2
     hidden_units: 512
         gamma: 0.995
     self_play:
       window: 10
-      play_against_latest_model_ratio: 0.0
+      play_against_latest_model_ratio: 0.5
       save_steps: 100000
       swap_steps: 2000
       team_change: 200000