Adding blob to object - works for Android, not on iOS

Hi all,

Got a bit of a weird one

Sending image to web service

var args = {
token : TOKEN,
image : procImage,
};
 
xhr.send(args);

07-30 10:27:19.363: I/TiAPI(8787): Object sent: {"token":"TOKEN","image":{"bubbleParent":true,"nativePath":null,"type":2,"file":null,"height":300,"length":13635,"text":null,"width":224,"mimeType":"image/jpeg"}}

However for iOS

{"token":"TOKEN","image":{}}

For some reason I can't add blob as object property on iOS?

Any help appreciated!