I have a fragment, viewmodel and database. I call this method in the viewModel from the fragment which deletes
data from database by a list of id's.

```
    fun deleteDefects(idList: List<Long>) {
        Log.d("RoundViewModel", idList.toString())
        viewModelScope.launch(Dispatchers.IO) {
            Log.d("RoundViewModel", idList.toString())
            ddb.dao().delAddedDefect(idList)
        }
    }

```

It works.. sometimes, about 2 or 3 times out of 10, deletes data. And sometimes idList
in launch is empty.

```
2020-06-26 18:40:44.461 18524-18524/ru.debaser.projects.inspectionsheet D/RoundViewModel: [259, 260]
2020-06-26 18:40:44.464 18524-18555/ru.debaser.projects.inspectionsheet D/RoundViewModel: []
2020-06-26 18:40:47.453 18524-18524/ru.debaser.projects.inspectionsheet D/RoundViewModel: [264, 267]
2020-06-26 18:40:47.457 18524-18555/ru.debaser.projects.inspectionsheet D/RoundViewModel: []
2020-06-26 18:40:50.838 18524-18524/ru.debaser.projects.inspectionsheet D/RoundViewModel: [276, 267]
2020-06-26 18:40:50.841 18524-18555/ru.debaser.projects.inspectionsheet D/RoundViewModel: []
2020-06-26 18:40:53.896 18524-18524/ru.debaser.projects.inspectionsheet D/RoundViewModel: [276, 267, 264]
2020-06-26 18:40:53.899 18524-18555/ru.debaser.projects.inspectionsheet D/RoundViewModel: []
2020-06-26 18:40:56.947 18524-18524/ru.debaser.projects.inspectionsheet D/RoundViewModel: [259, 260, 264]
2020-06-26 18:40:56.950 18524-18555/ru.debaser.projects.inspectionsheet D/RoundViewModel: []
2020-06-26 18:41:00.023 18524-18524/ru.debaser.projects.inspectionsheet D/RoundViewModel: [264, 265, 267]
2020-06-26 18:41:00.027 18524-18554/ru.debaser.projects.inspectionsheet D/RoundViewModel: []
2020-06-26 18:41:02.731 18524-18524/ru.debaser.projects.inspectionsheet D/RoundViewModel: [264, 265]
2020-06-26 18:41:02.733 18524-18554/ru.debaser.projects.inspectionsheet D/RoundViewModel: []
2020-06-26 18:41:08.200 18524-18524/ru.debaser.projects.inspectionsheet D/RoundViewModel: [277, 267]
2020-06-26 18:41:08.201 18524-18554/ru.debaser.projects.inspectionsheet D/RoundViewModel: []
2020-06-26 18:41:11.694 18524-18524/ru.debaser.projects.inspectionsheet D/RoundViewModel: [264, 259]
2020-06-26 18:41:11.695 18524-18554/ru.debaser.projects.inspectionsheet D/RoundViewModel: [264, 259]
2020-06-26 18:41:19.528 18524-18524/ru.debaser.projects.inspectionsheet D/RoundViewModel: [265, 267]
2020-06-26 18:41:19.530 18524-18591/ru.debaser.projects.inspectionsheet D/RoundViewModel: []
2020-06-26 18:41:23.780 18524-18524/ru.debaser.projects.inspectionsheet D/RoundViewModel: [276, 267]
2020-06-26 18:41:23.782 18524-18556/ru.debaser.projects.inspectionsheet D/RoundViewModel: [276, 267]

```