array unpatch get wrong result

[yangwch]

my code

// config
const instance = create({
  objectHash(obj, index) {
    if (typeof obj._id !== 'undefined') {
      return obj._id;
    }
    if (typeof obj.id !== 'undefined') {
      return obj.id;
    }
    if (typeof obj.name !== 'undefined') {
      return obj.name;
    }
    return `$$index:${index}`;
  },
  cloneDiffValues: true,
  arrays: {
    // default true, detect items moved inside the array
    // (otherwise they will be registered as remove+add)
    detectMove: true,
    // default false, the value of items moved is not included in deltas
    includeValueOnMove: false,
  },
});

const comps = [
  { id: 1, style: { zIndex: 1 } },
  { id: 2, style: { zIndex: 2 } },
  { id: 3, style: { zIndex: 3 } },
  { id: 4, style: { zIndex: 4 } },
  { id: 5, style: { zIndex: 5 } },
  { id: 6, style: { zIndex: 6 } },
  { id: 7, style: { zIndex: 7 } },
  { id: 8, style: { zIndex: 8 } },
  { id: 9, style: { zIndex: 9 } },
];
const orderedComps = [
  { id: 7, style: { zIndex: 1 } },
  { id: 8, style: { zIndex: 2 } },
  { id: 9, style: { zIndex: 3 } },
  { id: 1, style: { zIndex: 4 } },
  { id: 2, style: { zIndex: 5 } },
  { id: 3, style: { zIndex: 6 } },
  { id: 4, style: { zIndex: 7 } },
  { id: 5, style: { zIndex: 8 } },
  { id: 6, style: { zIndex: 9 } },
];
const delta = instance.diff(comps, orderedComps);
const undoComps = instance.unpatch(orderedComps, delta);
console.log('isEq', isEqual(undoComps, comps), undoComps)

result

isEq false [
  {"id":1,"style":{"zIndex":4}},
  {"id":2,"style":{"zIndex":1}},
  {"id":3,"style":{"zIndex":3}},
  {"id":4,"style":{"zIndex":4}},
  {"id":5,"style":{"zIndex":8}},
  {"id":6,"style":{"zIndex":5}},
  {"id":7,"style":{"zIndex":7}},
  {"id":8,"style":{"zIndex":6}},
  {"id":9,"style":{"zIndex":9}}
]