fix: Sort first layer in graph initialization. (#3383)

src/backend/base/langflow/graph/graph/base.py

@@ -1623,8 +1623,8 @@ class Graph:
 
         for vertex_id in first_layer:
             self.run_manager.add_to_vertices_being_run(vertex_id)
-        self._first_layer = first_layer
-        self._run_queue = deque(first_layer)
+        self._first_layer = sorted(first_layer)
+        self._run_queue = deque(self._first_layer)
         self._prepared = True
         self._record_snapshot()
         return self