If you're pulling CSV data from 130.248.148.130:443 (which according whois.com is owned by Adobe, your webjob might be timing out waiting for the request to complete. Not sure what API you're calling, but to investigate, I would look into any depenedencies your webjob uses. You can temporarily add application insights to your webjob in order to determine which requests/processes are taking the longest amount of time.
Let mek know if I can be of further assistance