Duplicate of #6115 which has a reproducer so subscribe to that ticket please.

@melloware I have checked the other ticket - it's not the same issue. This one is about table-level "onSort" prop, the other one is column-level "sortFunction", and the behavior problem is different.

I'll try to put together a reproductor example ASAP. Thanks!

ok if you add a reproducer i can re-open this one.

@melloware Added reproductor and more details to description of the issue! Thank you.

@melloware Hello! Can you assign me please ?

@SpajicM The TreeTable works fine, you just need to manually connect the states to the TreeTable using the 'sortOrder' and 'sortField' properties:

@KirilCycle oh, thanks! Is this documented anywhere or I've missed it?

TreeTable's main page only explains sortable and sortMode props, while API page for sortOrder says: "Order to sort the data by default.", which sounds like it's only for setting prefered initial order, not that it should be used in combination with onSort function.

@KirilCycle oh, thanks! Is this documented anywhere or I've missed it?

Well, I didn't see it in the documentation, only descriptions of specific props

I noticed that vueprime TreeTable doesn't need to pass options manually, I think we should modify the current TreeTable to have similar behaviour, as even props description says that 'sortField' and 'sortOrder' should be used at initial render

StackBlitz