Array diff loses results about jsondiffpatch HOT 2 CLOSED

left = [
    "10.13.13.70",
    "10.13.21.168",
    "10.13.4.137"
];
right=[
    "10.13.13.70",
    "10.13.13.71",
    "10.13.21.168",
    "10.13.4.137"
];

var delta = jsondiffpatch.diff(left, right)

jsondiffpatch.patch(left, delta)

// delta is now {"1":["10.13.13.71"],"_t":"a"}

// left is now equal to right

// undefined
console.log(jsondiffpatch.diff(left, right));