Ingestion service not receiving messages from IoT hub

[dalestone]

I am not sure if its an issue with the ingestion service or an Azure IoT hub quirk but I've only managed to get the ingestion service working once and then it stopped receiving messages. I thought it may be due to Azure Quota but issue persists even if I create a new IoT hub and results in zero messages.

Is there something else that needs to be created in Azure?