diff --git a/addons/web/static/src/views/list/list_controller.js b/addons/web/static/src/views/list/list_controller.js
index 8b287e0572c..fd35453abd7 100644
--- a/addons/web/static/src/views/list/list_controller.js
+++ b/addons/web/static/src/views/list/list_controller.js
@@ -448,6 +448,7 @@ export class ListController extends Component {
             confirm: async () => {
                 const total = root.count;
                 const resIds = await this.model.root.deleteRecords();
+                this.model.notify();
                 if (
                     root.isDomainSelected &&
                     resIds.length === session.active_ids_limit &&
diff --git a/addons/web/static/src/views/relational_model.js b/addons/web/static/src/views/relational_model.js
index 28f0eab2b43..977db751896 100644
--- a/addons/web/static/src/views/relational_model.js
+++ b/addons/web/static/src/views/relational_model.js
@@ -2201,9 +2201,15 @@ export class DynamicGroupList extends DynamicList {
     }
 
     async deleteRecords() {
+        const allResIds = [];
         for (const group of this.groups) {
-            group.list.deleteRecords();
+            const resIds = await group.list.deleteRecords();
+            group.count = group.count - resIds.length;
+            allResIds.push(...resIds);
         }
+        // Return the list of all deleted resIds.
+        // Will be used by the calling group to update its count.
+        return allResIds;
     }
 
     exportState() {
diff --git a/addons/web/static/tests/views/list_view_tests.js b/addons/web/static/tests/views/list_view_tests.js
index 6ebc8b7acfc..935c88e521a 100644
--- a/addons/web/static/tests/views/list_view_tests.js
+++ b/addons/web/static/tests/views/list_view_tests.js
@@ -5185,6 +5185,57 @@ QUnit.module("Views", (hooks) => {
         );
     });
 
+    QUnit.test(
+        "grouped, update the count of the group (and ancestors) when a record is deleted",
+        async function (assert) {
+            serverData.models.foo.records = [
+                { id: 121, foo: "blip", bar: true },
+                { id: 122, foo: "blip", bar: true },
+                { id: 123, foo: "blip", bar: true },
+                { id: 124, foo: "blip", bar: true },
+                { id: 125, foo: "blip", bar: false },
+                { id: 126, foo: "blip", bar: false },
+            ];
+            await makeView({
+                type: "list",
+                resModel: "foo",
+                serverData,
+                arch: /*xml*/ `
+                    <tree expand="1">
+                        <field name="foo"/>
+                    </tree>`,
+                groupBy: ["foo", "bar"],
+                actionMenus: {},
+            });
+            assert.strictEqual(
+                target.querySelector(".o_group_header:first-child").textContent.trim(),
+                "blip (6)"
+            );
+            assert.strictEqual(
+                target.querySelector(".o_group_header:nth-child(2)").textContent.trim(),
+                "No (2)"
+            );
+
+            const secondNestedGroup = target.querySelector(".o_group_header:nth-child(3)");
+            assert.strictEqual(secondNestedGroup.textContent.trim(), "Yes (4)");
+            await click(secondNestedGroup);
+            assert.containsN(target, ".o_data_row", 4);
+
+            await click(target.querySelector(".o_data_row input"));
+            await toggleActionMenu(target);
+            await toggleMenuItem(target, "Delete");
+            await click(target, ".modal .btn-primary");
+            assert.strictEqual(
+                target.querySelector(".o_group_header:first-child").textContent.trim(),
+                "blip (5)"
+            );
+            assert.strictEqual(
+                target.querySelector(".o_group_header:nth-child(3)").textContent.trim(),
+                "Yes (3)"
+            );
+        }
+    );
+
     QUnit.test("pager (ungrouped and grouped mode), default limit", async function (assert) {
         assert.expect(4);