diff --git a/addons/sale/models/payment_transaction.py b/addons/sale/models/payment_transaction.py
index b770cb15c0f..aafbabb3dda 100644
--- a/addons/sale/models/payment_transaction.py
+++ b/addons/sale/models/payment_transaction.py
@@ -61,7 +61,9 @@ class PaymentTransaction(models.Model):
             # vice versa.
             if len(tx.sale_order_ids) == 1:
                 quotation = tx.sale_order_ids.filtered(lambda so: so.state in ('draft', 'sent'))
-                if quotation and len(quotation.transaction_ids) == 1:
+                if quotation and len(quotation.transaction_ids.filtered(
+                    lambda tx: tx.state in ('authorized', 'done')  # Only consider confirmed tx
+                )) == 1:
                     # Check if the SO is fully paid
                     if quotation.currency_id.compare_amounts(tx.amount, quotation.amount_total) == 0:
                         quotation.with_context(send_email=True).action_confirm()
diff --git a/addons/sale/tests/test_payment_flow.py b/addons/sale/tests/test_payment_flow.py
index 01c3dc0a946..6d11b1b72f9 100644
--- a/addons/sale/tests/test_payment_flow.py
+++ b/addons/sale/tests/test_payment_flow.py
@@ -197,6 +197,28 @@ class TestSalePayment(PaymentHttpCommon):
 
         self.assertEqual(self.order.state, 'draft', 'a partial transaction with automatic invoice and invoice_policy = delivery should not validate a quote')
 
+    def test_confirmed_transactions_comfirms_so_with_multiple_transaction(self):
+        """ Test that a confirmed transaction confirms a SO even if one or more non-confirmed
+        transactions are linked. """
+        # Create the payment
+        self.amount = self.order.amount_total
+        self._create_transaction(
+            flow='redirect',
+            sale_order_ids=[self.order.id],
+            state='draft',
+            reference='Test Transaction Draft 1',
+        )
+        self._create_transaction(
+            flow='redirect',
+            sale_order_ids=[self.order.id],
+            state='draft',
+            reference='Test Transaction Draft 2',
+        )
+        tx = self._create_transaction(flow='redirect', sale_order_ids=[self.order.id], state='done')
+        tx._reconcile_after_done()
+
+        self.assertEqual(self.order.state, 'sale')
+
     def test_auto_confirm_and_auto_invoice(self):
         # Set automatic invoice
         self.env['ir.config_parameter'].sudo().set_param('sale.automatic_invoice', 'True')