sortable transform is null in nested arrays.

[ofirgo1]

I have an array that in each item there is an object.
Inside the object there is another array.
I use the useSortable hook on the inner arrays, the logic works, but the transform always returns null, so there is no animation.
Is there an option to resolve this issue?

rows: [
{id:1 , subRows: [id: 1, id: 2, id: 3]}
{id:2 , subRows: [id: 4, id: 5, id: 6]}
{id:3 , subRows: [id: 7, id: 8, id: 9]}
]

the sortable on the rows array works good and with the transform.
the sortable on any of the subRows arrays works good in the logic but without the transform.