Id collision error when replacing data if store is filtered

[matsbryntse]

https://www.bryntum.com/forum/viewtopic.php?f=52&t=13145
Open basic gantt demo and run the code below:

const taskStore = gantt.taskStore;
taskStore.data = [
              {
                "id": 1,
                "name": "Task 1",
                "startDate": "2019-09-18",
                "endDate": "2019-09-22",
                "expanded": true,
                "children": [
                  {
                    "id": 2,
                    "name": "Task 2",
                    "startDate": "2019-09-18",
                    "endDate": "2019-09-19"
                  },
                  {
                    "id": 3,
                    "name": "Task 3",
                    "startDate": "2019-09-20",
                    "endDate": "2019-09-22"
                  }
                ]
              }
            ];

            taskStore.filter(t => false);
            taskStore.data = [
              {
                "id": 1,
                "name": "Task 1",
                "startDate": "2019-09-18",
                "endDate": "2019-09-22",
                "expanded": true,
                "children": [
                  {
                    "id": 2,
                    "name": "Task 2",
                    "startDate": "2019-09-18",
                    "endDate": "2019-09-19"
                  },
                  {
                    "id": 3,
                    "name": "Task 3",
                    "startDate": "2019-09-20",
                    "endDate": "2019-09-22"
                  }
                ]
              }
            ];