Semantic cache issue on complex rag chain

[pmosconi]

Hi,
I am following notebooks/rag/mongodb-langchain-cache-memory.ipynb
and I have an issue when activating semantic cache for the complete RAG chain: the system always returns the answer to the first question that has been cached.
Why is this happening?
The notebook, in fact, applies the cache only to the simplified RAG chain, but it doesn't explain why the full chain won't work with it.
Thanks