Get incorrect delta by Delta.transform

[weiQuill]

Delta package version: 4.2.2

In my use case, the results obtained by Delta.transform were not as expected.

It caused undo doesn't work as expected in the table.
I suspect that in this case, the delete operation was moved to the end causing this issue. Does any have a solution?
Thanks a lot:)

Before undo:

After undo:

Expected results:

Original delta in undo stack

{
  "ops": [
    {
      "retain": 4
    },
    {
      "retain": 1,
      "attributes": {
        "table-cell-line": {
          "row": "row-jj2vxw",
          "cell": "cell-jkfu51"
        },
      }
    },
    {
      "retain": 1,
      "attributes": {
        "table-cell-line": {
          "row": "row-pzu42n",
          "cell": "cell-5s14ao"
        },
      }
    },
    {
      "retain": 1,
      "attributes": {
        "table-cell-line": {
          "row": "row-pzu42n",
          "cell": "cell-oc2pfj"
        },
      }
    },
    {
      "retain": 1,
      "attributes": {
        "table-cell-line": null,
        "row": null,
        "cell": null,
        "rowspan": null,
        "colspan": null
      }
    },
    {
      "delete": 1
    }
  ]
}

delta for remote changes

{
  "ops": [
    {
      "retain": 7
    },
    {
      "insert": "2"
    }
  ]
}

transformed delta in undo stack

{
  "ops": [
    {
      "retain": 4
    },
    {
      "retain": 1,
      "attributes": {
        "table-cell-line": {
          "row": "row-jj2vxw",
          "cell": "cell-jkfu51"
        },
      }
    },
    {
      "retain": 1,
      "attributes": {
        "table-cell-line": {
          "row": "row-pzu42n",
          "cell": "cell-5s14ao"
        },
      }
    },
    {
      "retain": 1,
      "attributes": {
        "table-cell-line": {
          "row": "row-pzu42n",
          "cell": "cell-oc2pfj"
        },
      }
    },
    {
      "retain": 1
    },
    {
      "retain": 1,
      "attributes": {
        "table-cell-line": null,
        "row": null,
        "cell": null,
      }
    },
    {
      "delete": 1
    }
  ]
}

[weiQuill]

I would like to know why the Original delta in undo stack is not:

{
  "ops": [
    {
      "retain": 4
    },
     {
      "delete": 1
     }
  ]
}

I also tested for lines(have no attributes), will got the undoDelta like the above. It looks like my custom attributes are causing the diff calculations to be different.