When kanban is virtualized, calling the updateTask method does not update the task in the datasource. It will move the task to the correct column, but once the kanban refreshes it will move it back to the original column. When this happened I looked into the datasource and it looks like it’s not updating correctly.
updateTask updates the dataSource item, too. What do you mean by “Kanban refreshes” ? Do you call specific methods to refresh the Kanban? In general, we will need information about how to reproduce the reported behavior.