[FIX] picking

controllers/main.py

@@ -354,6 +354,10 @@ class PosSales(http.Controller):
         invoice_id = sale_order.action_invoice_create()
         invoice = request.env['account.invoice'].browse(invoice_id)
 
+        for picking in sale_order.picking_ids:
+            picking.force_assign()
+            picking.action_done()
+
         date_due = parse(date_today) + rd(days=max(invoice.payment_term.line_ids.mapped(lambda x: x.days + x.days2)))
 
         invoice.write({