`Set Value` does not triggering `Fetch From` Functionality in Child Doc

Frappe Framework
1

Ex: In a Child Doc a Link Field invoice is linked to Doctype Purchase Invoice.
If I select manually any Purchase Invoice in the invoice field it fetches values from the selected Purchase Invoice and manupulates in the respective fields of the child table through Fetch From Functionality.

But if I set value with frappe.model.set_value() in the invoice field with below code:
It does not trigger the fetch from functionality.

let child = frappe.model.add_child(frm.doc, <Child_Table_Field_Name>);
frappe.model.set_value(child.doctype, child.name, 'invoice', 'an_entity_of_purchase_invoice');
frm.refresh_field('Child_Table_Field_Nam')

Is it the normal behavior or am I not doing it properly?

2

Please check the reference: Fetch Child table form one doctype to other doctype - #6 by NCP

3

I was looking for why Fetch From does not work in the Child doc when we set value in a link field with frappe.model.set_value().

Btw, thanks for your great effort, I have already implemented the approach you shown in the video.