chat history makes the system deadlock.

[dk-teknologisk-mlnn]

I have to comment out the chat_history append for it to work. if the conversation is added to the history, only the first question I ask will receive an answer.

With this #:
#chat_history.append((query, result['answer']))
I can keep asking questions, but lose the functionality that it knows what the last question was.
I see the langchain docs that we need to allocate chat history memory objects. but doing this does not help.

memory = ConversationBufferMemory(memory_key="chat_history", return_messages=True)
chain = ConversationalRetrievalChain.from_llm(
llm=ChatOpenAI(model="gpt-3.5-turbo"),
retriever=index.vectorstore.as_retriever(search_kwargs={"k": 1}),
memory=memory
)

with this, it still deadlocks.