Trouble Storing PDF Document Embeddings in Pinecone Index

I am encountering difficulties in storing PDF document embeddings into my Pinecone index. I used Langchain to split the documents into chunks and then converted them into OpenAI embeddings. When I check the embeddings locally, they appear to have been generated correctly. However, upon sending them to Pinecone, the vectors appear empty in the index dashboard. The expected quantity of vectors arrives and they are sorted into the correct namespaces, but when querying the vector store, they show up empty. I have attempted to delete my index and create a new one, but to no avail. Additionally, I would appreciate any advice on how to change the region of my index in Pinecone.

Thank you in advance for any assistance you can provide.