diff --git a/packages/devextreme/js/__internal/ui/m_drop_down_button.ts b/packages/devextreme/js/__internal/ui/m_drop_down_button.ts
index e07d95ab19c8..28fa8ddca71b 100644
--- a/packages/devextreme/js/__internal/ui/m_drop_down_button.ts
+++ b/packages/devextreme/js/__internal/ui/m_drop_down_button.ts
@@ -700,7 +700,7 @@ class DropDownButton extends Widget<DropDownButtonProperties> {
   }
 
   _updateItemCollection(optionName): void {
-    const selectedItemKey = this.option('selectedItemKey');
+    const { selectedItemKey, useSelectMode } = this.option();
     this._setListOption('selectedItem', null);
     // @ts-expect-error ts-error
     this._setWidgetOption('_list', [optionName]);
@@ -708,8 +708,10 @@ class DropDownButton extends Widget<DropDownButtonProperties> {
     if (isDefined(selectedItemKey)) {
       this._loadSelectedItem()
         .done((selectedItem) => {
-          this._setListOption('selectedItemKeys', [selectedItemKey]);
-          this._setListOption('selectedItem', selectedItem);
+          if (useSelectMode) {
+            this._setListOption('selectedItemKeys', [selectedItemKey]);
+            this._setListOption('selectedItem', selectedItem);
+          }
         // eslint-disable-next-line @typescript-eslint/no-unused-vars
         }).fail((error) => {
           this._setListOption('selectedItemKeys', []);
diff --git a/packages/devextreme/testing/tests/DevExpress.ui.widgets/dropDownButton.tests.js b/packages/devextreme/testing/tests/DevExpress.ui.widgets/dropDownButton.tests.js
index 90219bab3bf1..0c4faa275ab1 100644
--- a/packages/devextreme/testing/tests/DevExpress.ui.widgets/dropDownButton.tests.js
+++ b/packages/devextreme/testing/tests/DevExpress.ui.widgets/dropDownButton.tests.js
@@ -32,6 +32,8 @@ const DROP_DOWN_EDITOR_OVERLAY_CLASS = 'dx-dropdowneditor-overlay';
 const CUSTOM_CLASS = 'custom-class';
 const LIST_CLASS = 'dx-list';
 const LIST_ITEMS_CLASS = 'dx-list-items';
+const LIST_ITEM_CLASS = 'dx-list-item';
+const LIST_ITEM_SELECTED_CLASS = 'dx-list-item-selected';
 
 const OVERLAY_CONTENT_LABEL = 'Dropdown';
 
@@ -1256,6 +1258,22 @@ QUnit.module('list integration', {}, () => {
 
         assert.deepEqual(list.option('selectedItemKeys'), [0], 'List has correct selection');
     });
+
+    QUnit.test('list items should not have selected class from ddb selectedItemKey after set items at runtime (T1314783)', function(assert) {
+        const dropDownButton = new DropDownButton($('#dropDownButton'), {
+            items: ['item1'],
+            useSelectMode: false,
+            opened: true,
+            selectedItemKey: 'item1',
+        });
+        const list = getList(dropDownButton);
+
+        dropDownButton.option('items', ['item1']);
+        const $listItems = list.itemElements();
+
+        assert.strictEqual($listItems.length, 1, 'there is one list item');
+        assert.strictEqual($listItems.hasClass(LIST_ITEM_SELECTED_CLASS), false, 'item does not have selected class');
+    });
 });
 
 QUnit.module('common use cases', {