Here s a bug in the 0 6 version If I add

Here's a bug in the 0.6 version. If I add the documents to the vector as follows:
index = GPTVectorStoreIndex([], service_context=service_context)
for i, doc_chunk in enumerate(chunks_so_far):
index.insert(doc_chunk)
then when it persists the storage_context , no doc_ids get written to the json file.
When I build it with the one line.
tree_index = GPTVectorStoreIndex.from_documents(chunks_so_far, service_context=service_context)
it works fine to save the index. I assume the first version should work.