diff --git a/python/ray/dag/compiled_dag_node.py b/python/ray/dag/compiled_dag_node.py
index 27a68595d858..b8a3cb7bf209 100644
--- a/python/ray/dag/compiled_dag_node.py
+++ b/python/ray/dag/compiled_dag_node.py
@@ -661,7 +661,7 @@ def __init__(
             # We conservatively set num_shm_buffers to _max_inflight_executions.
             # It means that the DAG can be underutilized, but it guarantees there's
             # no false positive timeouts.
-            num_shm_buffers=self._max_inflight_executions,
+            num_shm_buffers=1,
         )
         if not isinstance(self._buffer_size_bytes, int) or self._buffer_size_bytes <= 0:
             raise ValueError(
diff --git a/python/ray/dag/tests/experimental/test_accelerated_dag.py b/python/ray/dag/tests/experimental/test_accelerated_dag.py
index f30f39a65e42..50b08550cb25 100644
--- a/python/ray/dag/tests/experimental/test_accelerated_dag.py
+++ b/python/ray/dag/tests/experimental/test_accelerated_dag.py
@@ -1970,6 +1970,7 @@ def test_driver_and_actor_as_readers(ray_start_cluster):
         dag.experimental_compile()
 
 
+@pytest.mark.skip("Currently buffer size is set to 1 because of regression.")
 @pytest.mark.parametrize("temporary_change_timeout", [1], indirect=True)
 def test_buffered_inputs(shutdown_only, temporary_change_timeout):
     ray.init()