diff --git a/addons/web/static/src/views/form/form_controller.js b/addons/web/static/src/views/form/form_controller.js
index bf9df625deb..8f71d75d7b5 100644
--- a/addons/web/static/src/views/form/form_controller.js
+++ b/addons/web/static/src/views/form/form_controller.js
@@ -103,17 +103,23 @@ export class FormController extends Component {
         const beforeLoadProm = new Promise((r) => {
             this.beforeLoadResolver = r;
         });
-        this.model = useModel(this.props.Model, {
-            resModel: this.props.resModel,
-            resId: this.props.resId || false,
-            resIds: this.props.resIds,
-            fields: this.props.fields,
-            activeFields,
-            viewMode: "form",
-            rootType: "record",
-            mode: this.props.mode,
-            beforeLoadProm,
-        });
+        this.model = useModel(
+            this.props.Model,
+            {
+                resModel: this.props.resModel,
+                resId: this.props.resId || false,
+                resIds: this.props.resIds,
+                fields: this.props.fields,
+                activeFields,
+                viewMode: "form",
+                rootType: "record",
+                mode: this.props.mode,
+                beforeLoadProm,
+            },
+            {
+                ignoreUseSampleModel: true,
+            }
+        );
         const { create, edit } = this.archInfo.activeActions;
 
         this.canCreate = create && !this.props.preventCreate;
diff --git a/addons/web/static/src/views/model.js b/addons/web/static/src/views/model.js
index 5941e9fcdc7..fea46f92b37 100644
--- a/addons/web/static/src/views/model.js
+++ b/addons/web/static/src/views/model.js
@@ -119,18 +119,21 @@ export function useModel(ModelClass, params, options = {}) {
     async function load(props) {
         const searchParams = getSearchParams(props);
         await model.load(searchParams);
-        if (useSampleModel && !model.hasData()) {
-            sampleORM =
-                sampleORM || buildSampleORM(component.props.resModel, component.props.fields, user);
-            sampleORM.setGroups(model.getGroups());
-            // Load data with sampleORM then restore real ORM.
-            model.orm = sampleORM;
-            await model.load(searchParams);
-            model.orm = orm;
-        } else {
-            useSampleModel = false;
+        if (!options.ignoreUseSampleModel) {
+            if (useSampleModel && !model.hasData()) {
+                sampleORM =
+                    sampleORM ||
+                    buildSampleORM(component.props.resModel, component.props.fields, user);
+                sampleORM.setGroups(model.getGroups());
+                // Load data with sampleORM then restore real ORM.
+                model.orm = sampleORM;
+                await model.load(searchParams);
+                model.orm = orm;
+            } else {
+                useSampleModel = false;
+                model.useSampleModel = useSampleModel;
+            }
         }
-        model.useSampleModel = useSampleModel;
         if (started) {
             model.notify();
         }
diff --git a/addons/web/static/tests/webclient/actions/window_action_tests.js b/addons/web/static/tests/webclient/actions/window_action_tests.js
index 48ea011465c..ba58fb546a8 100644
--- a/addons/web/static/tests/webclient/actions/window_action_tests.js
+++ b/addons/web/static/tests/webclient/actions/window_action_tests.js
@@ -2393,4 +2393,37 @@ QUnit.module("ActionManager", (hooks) => {
         // mode is "edit" because target="new"
         assert.containsOnce(target, ".o_form_view .o_form_editable");
     });
+
+    QUnit.test("action group_by of type string", async function (assert) {
+        serverData.models.partner.records = [];
+        serverData.views["partner,false,list"] = `
+            <tree sample="1">
+                <field name="name"/>
+            </tree>    
+        `;
+        serverData.views["partner,false,form"] = `
+            <form>
+                <field name="name"/>
+            </form>
+        `;
+        registry.category("services").add("user", makeFakeUserService());
+        const webClient = await createWebClient({ serverData });
+        await doAction(webClient, {
+            name: "Partner",
+            res_model: "partner",
+            type: "ir.actions.act_window",
+            views: [
+                [false, "list"],
+                [false, "form"],
+            ],
+        });
+
+        assert.containsOnce(target, ".o_list_view .o_content.o_view_sample_data");
+
+        await click(target.querySelector(".o_list_view .o_list_button_add"));
+
+        await click(target.querySelector(".o_form_view .breadcrumb-item a"));
+
+        assert.containsOnce(target, ".o_list_view .o_content.o_view_sample_data");
+    });
 });