From 69de5d3f1d191826b5c00ff6968c12c287c5544c Mon Sep 17 00:00:00 2001
From: Aliullov Vlad <vladislav.aliullov@devexpress.com>
Date: Wed, 6 May 2026 18:15:55 +0200
Subject: [PATCH 1/2] =?UTF-8?q?fix=20TypeError=20=E2=80=94=20on=20accessin?=
 =?UTF-8?q?g=20a=20component=20instance=20while=20unmounting=20(T1327953)?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 packages/devextreme-react/src/core/options-manager.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/packages/devextreme-react/src/core/options-manager.ts b/packages/devextreme-react/src/core/options-manager.ts
index 2681307e8ce4..df00edd60b6b 100644
--- a/packages/devextreme-react/src/core/options-manager.ts
+++ b/packages/devextreme-react/src/core/options-manager.ts
@@ -167,7 +167,7 @@ class OptionsManager {
         && e.value instanceof Object
         && shallowEquals(value as Record<string, unknown>, e.value as Record<string, unknown>);
 
-      if (valuesAreEqual || valuesAreEqualObjects || this.instance.skipOptionsRollBack) {
+      if (valuesAreEqual || valuesAreEqualObjects || this.instance?.skipOptionsRollBack) {
         return;
       }
 

From d1dacc05f07941a1e74a920b5ef93345953a5ede Mon Sep 17 00:00:00 2001
From: Aliullov Vlad <vladislav.aliullov@devexpress.com>
Date: Wed, 6 May 2026 18:26:54 +0200
Subject: [PATCH 2/2] add test for T1327953

---
 .../core/__tests__/props-updating.test.tsx    | 32 +++++++++++++++++++
 1 file changed, 32 insertions(+)

diff --git a/packages/devextreme-react/src/core/__tests__/props-updating.test.tsx b/packages/devextreme-react/src/core/__tests__/props-updating.test.tsx
index e4eca777a6e5..c841f276a9c3 100644
--- a/packages/devextreme-react/src/core/__tests__/props-updating.test.tsx
+++ b/packages/devextreme-react/src/core/__tests__/props-updating.test.tsx
@@ -1042,6 +1042,38 @@ describe('cfg-component option control', () => {
     expect((optionsManager as any).setValue).toHaveBeenCalledTimes(1);
   });
 
+  it('does not crash when option change handler unmounts component (T1327953)', () => {
+    const optionsManager = new OptionsManagerModule.OptionsManager();
+    const config = {
+      name: '',
+      predefinedOptions: {},
+      initialOptions: {},
+      options: {
+        value: 1,
+        onValueChange: () => {
+          optionsManager.dispose();
+        },
+      },
+      templates: [],
+      configs: {},
+      configCollections: {},
+    };
+
+    optionsManager.setInstance({
+      skipOptionsRollBack: false,
+      option: jest.fn(),
+      resetOption: jest.fn(),
+      on: jest.fn(),
+      off: jest.fn(),
+      beginUpdate: jest.fn(),
+      endUpdate: jest.fn(),
+    }, config, ['value'], []);
+
+    expect(() => {
+      optionsManager.onOptionChanged({ name: 'value', value: 2, fullName: 'value' });
+    }).not.toThrow();
+  });
+
   it('apply cfg-component option change if value really change', () => {
     const TestContainer = (props: any) => {
       const { value } = props;