fix: fix streaming with httpx client

prevent overwriting streams in parallel streaming calls

litellm/main.py

@@ -361,6 +361,7 @@ async def acompletion(
             )  # sets the logging event loop if the user does sync streaming (e.g. on proxy for sagemaker calls)
         return response
     except Exception as e:
+        traceback.print_exc()
         custom_llm_provider = custom_llm_provider or "openai"
         raise exception_type(
             model=model,