Null Response From Instruments

When looking at the Appium logs, after Appium attempts to find an element and retrieve the XML from instruments, instruments responds with the following:

{“status”:0,“value”:{“UIAApplication”:{"@":{“name”:null,“label”:null,“value”:null,“dom”:null,“enabled”:false,“valid”:false,“visible”:false,“hint”:null,“path”:"/0",“x”:0,“y”:0,“width”:0,“height”:0},">":[]}}}

My question is, what causes a response like this to occur? Is this an issue with Appium being able to communicate with instruments or an issue with instruments obtaining the device hierarchy?

I am running against Appium v1.4.13, IOS 9.1, Java Client, Yosemite v10.10.5