Fixed critical section

server.py

@@ -635,9 +635,9 @@ class LeaderboardServer:
         )
 
     def get_model_detail(self, submission_id):
-        if submission_id not in self.submission_id_to_data:
-            raise gr.Error(f"Submission [{submission_id}] not found")
-        else:
-            with self.var_lock.ro:
+        with self.var_lock.ro:
+            if submission_id not in self.submission_id_to_data:
+                raise gr.Error(f"Submission [{submission_id}] not found")
+            else:
                 data = self.submission_id_to_data[submission_id]
-            return data["metadata"]
+                return data["metadata"]