Large number of errors calling the API

I am using Neo4j in a LangChain application for RAG, but I do seem to get a worrying number of errors when calling the API to retrieve nodes, and often too when merging nodes on data ingest.

It really is rather disappointing: the number of errors is making me lose confidence in the product. I am using the smallest paid config via GCP.

The error tends to be ServiceUnavailable('Unable to retrieve routing information')