Cannot use updateRow or updateRows method to add add rows with children

[paul121]

When using updateRow or updateRows to add rows with child rows it seems that these are not correctly added.. I get a row label of undefined and then when adding tasks for these rows via updateTasks I get the following error:

TypeError: Cannot read properties of undefined (reading 'y')

It seems that the y value might not be set for these new rows?

Adding child rows does work when using gantt.$set({rows}). I also tested adding these rows all as parent/top-level rows via updateRow and updateRows and they worked fine, all tasks were added correctly with updateTasks.

I see that the updateRow and updateRows methods call rowFactory.createRow(model, null) where null is the Y value: https://github.com/ANovokmet/svelte-gantt/blob/773a6a9621c3cd4675854608f8d9400ba68a1a02/packages/svelte-gantt/src/Gantt.svelte#L676-L683

But the initRows logic is different calls rowFactory.createRows(rows): https://github.com/ANovokmet/svelte-gantt/blob/773a6a9621c3cd4675854608f8d9400ba68a1a02/packages/svelte-gantt/src/Gantt.svelte#L461-L465

It seems that rowFactory.createRows is the only method that ever calls rowFactory.createChildRows: https://github.com/ANovokmet/svelte-gantt/blob/773a6a9621c3cd4675854608f8d9400ba68a1a02/packages/svelte-gantt/src/core/row.ts#L59-L65