make a copy of initial state

Author: yiyixuxu

src/diffusers/modular_pipelines/modular_pipeline.py

@@ -1972,6 +1972,8 @@ def __call__(self, state: PipelineState = None, output: Union[str, List[str]] =
         """
         if state is None:
             state = PipelineState()
+        else:
+            state = deepcopy(state)
 
         # Make a copy of the input kwargs
         passed_kwargs = kwargs.copy()