diff --git a/addons/point_of_sale/static/src/app/store/pos_store.js b/addons/point_of_sale/static/src/app/store/pos_store.js
index 30b4eba6586..959f4e296ec 100644
--- a/addons/point_of_sale/static/src/app/store/pos_store.js
+++ b/addons/point_of_sale/static/src/app/store/pos_store.js
@@ -1715,6 +1715,11 @@ export class PosStore extends Reactive {
     async sendOrderInPreparationUpdateLastChange(order, cancelled = false) {
         await this.sendOrderInPreparation(order, cancelled);
         order.updateLastOrderChange();
+
+        //We make sure that the last_order_change is updated in the backend
+        order.save_to_db();
+        order.pos.ordersToUpdateSet.add(this);
+        order.pos.sendDraftToServer();
     }
     closeScreen() {
         this.addOrderIfEmpty();
diff --git a/addons/pos_restaurant/static/tests/tours/pos_restaurant.js b/addons/pos_restaurant/static/tests/tours/pos_restaurant.js
index 995e7e7f522..ac1629b1c39 100644
--- a/addons/pos_restaurant/static/tests/tours/pos_restaurant.js
+++ b/addons/pos_restaurant/static/tests/tours/pos_restaurant.js
@@ -142,3 +142,16 @@ registry.category("web_tour.tours").add("pos_restaurant_sync_second_login", {
             FloorScreen.orderCountSyncedInTableIs("4", "1"),
         ].flat(),
 });
+
+registry.category("web_tour.tours").add("SaveLastPreparationChangesTour", {
+        test: true,
+        url: "/pos/ui",
+        steps: () => [
+            ProductScreen.confirmOpeningPopup(),
+            FloorScreen.clickTable("5"),
+            ProductScreen.clickDisplayedProduct("Coca-Cola"),
+            ProductScreen.selectedOrderlineHas("Coca-Cola", "1.0"),
+            ProductScreen.clickOrderButton(),
+            ProductScreen.orderlinesHaveNoChange()
+        ].flat(),
+    });
diff --git a/addons/pos_restaurant/tests/test_frontend.py b/addons/pos_restaurant/tests/test_frontend.py
index b00918a0066..2380b59fec3 100644
--- a/addons/pos_restaurant/tests/test_frontend.py
+++ b/addons/pos_restaurant/tests/test_frontend.py
@@ -262,3 +262,10 @@ class TestFrontend(AccountTestInvoicingCommon, HttpCaseWithUserDemo):
         self.office_combo.write({'lst_price': 40})
         self.pos_config.with_user(self.pos_admin).open_ui()
         self.start_tour(f"/pos/ui?config_id={self.pos_config.id}", 'SplitBillScreenTour4PosCombo', login="pos_admin")
+
+    def test_10_save_last_preparation_changes(self):
+        self.pos_config.write({'printer_ids': False})
+        self.pos_config.with_user(self.pos_admin).open_ui()
+        self.start_tour("/pos/ui?config_id=%d" % self.pos_config.id, 'SaveLastPreparationChangesTour', login="pos_admin")
+        self.assertTrue(self.pos_config.current_session_id.order_ids.last_order_preparation_change, "There should be a last order preparation change")
+        self.assertTrue("Coca" in self.pos_config.current_session_id.order_ids.last_order_preparation_change, "The last order preparation change should contain 'Coca'")