From 1b50fc094298963f4c78724b6912228b2618523b Mon Sep 17 00:00:00 2001
From: Aleksey Semikozov <2846685+aleksei-semikozov@users.noreply.github.com>
Date: Mon, 26 Oct 2026 07:54:53 -0300
Subject: [PATCH] T1337212 PivotGrid - Header filter loads infinitely when
 field values request fails

---
 .../data_source/m_data_source.test.ts         | 32 +++++++++++++++++++
 .../pivot_grid/data_source/m_data_source.ts   |  2 +-
 2 files changed, 33 insertions(+), 1 deletion(-)
 create mode 100644 packages/devextreme/js/__internal/grids/pivot_grid/data_source/m_data_source.test.ts

diff --git a/packages/devextreme/js/__internal/grids/pivot_grid/data_source/m_data_source.test.ts b/packages/devextreme/js/__internal/grids/pivot_grid/data_source/m_data_source.test.ts
new file mode 100644
index 000000000000..57b4a44feec4
--- /dev/null
+++ b/packages/devextreme/js/__internal/grids/pivot_grid/data_source/m_data_source.test.ts
@@ -0,0 +1,32 @@
+import { describe, expect, it } from '@jest/globals';
+import CustomStore from '@js/data/custom_store';
+
+import { PivotGridDataSource } from './m_data_source';
+
+describe('PivotGridDataSource', () => {
+  describe('getFieldValues', () => {
+    it('should reject when the store fails to load field values (T1337212)', async () => {
+      const loadError = new Error('Load failed');
+      let shouldFail = false;
+      const dataSource = new PivotGridDataSource({
+        remoteOperations: true,
+        store: new CustomStore({
+          load: (): Promise<unknown> => (shouldFail
+            ? Promise.reject(loadError)
+            : Promise.resolve({ data: [] })),
+        }),
+        fields: [{ dataField: 'region', area: 'row' }],
+      });
+      await dataSource.load();
+      shouldFail = true;
+
+      const result = await new Promise((resolve) => {
+        dataSource.getFieldValues(0, false, undefined)
+          .done(() => resolve('resolved'))
+          .fail((error) => resolve(error));
+      });
+
+      expect(result).toBe(loadError);
+    });
+  });
+});
diff --git a/packages/devextreme/js/__internal/grids/pivot_grid/data_source/m_data_source.ts b/packages/devextreme/js/__internal/grids/pivot_grid/data_source/m_data_source.ts
index c61f05e80828..6cfb4982e08c 100644
--- a/packages/devextreme/js/__internal/grids/pivot_grid/data_source/m_data_source.ts
+++ b/packages/devextreme/js/__internal/grids/pivot_grid/data_source/m_data_source.ts
@@ -750,7 +750,7 @@ class PivotGridDataSource {
           that._sort(loadOptions, data);
         }
         d.resolve(data.columns);
-      }).fail(d);
+      }).fail(d.reject);
     } else {
       d.reject();
     }