I am calling the Items API from cross-domain using JSONP and a callback. It gets run in a loop against up to 700 item internal IDs. about 90% of the calls to the API are successful, but sporadically some of the Items will throw a 500 error, but when pulling the URL for that item in the Network tab and entering it in a new tab on a web browser, it works fine. Anyone have any ideas why this would happen?