fix: https://github.com/ant-design/ant-design/issues/50642

src/BaseSelect/index.tsx

@@ -606,7 +606,7 @@ const BaseSelect = React.forwardRef<BaseSelectRef, BaseSelectProps>((props, ref)
       } else if (mode === 'multiple') {
         // `multiple` mode only clean the search value but not trigger event
         onSearch('', {
-          source: 'blur',
+          source: mergedShowSearch ? 'effect' : 'blur',
         });
       }
     }

tests/BaseSelect.test.tsx

@@ -123,4 +123,54 @@ describe('BaseSelect', () => {
 
     expect(container.querySelector('.rc-select-dropdown-placement-fallback')).toBeTruthy();
   });
+
+  describe("Testing BaseSelect component's onContainerBlur params", () => {
+    it('BaseSelect with showSearch, onContainerBlur params is effect', () => {
+      const onSearch = jest.fn();
+      const { container } = render(
+        <BaseSelect
+          prefixCls="rc-select"
+          mode="multiple"
+          id="test"
+          displayValues={[]}
+          onDisplayValuesChange={() => {}}
+          searchValue="1"
+          showSearch
+          open
+          onSearch={onSearch}
+          OptionList={OptionList}
+          emptyOptions
+        />,
+      );
+      expect(container.querySelector('div.rc-select')).toBeTruthy();
+      fireEvent.change(container.querySelector('input'), { target: { value: '2' } });
+      expect(onSearch).toHaveBeenCalledWith('2', { source: 'typing' });
+      fireEvent.blur(container.querySelector('div.rc-select'));
+      expect(onSearch).toHaveBeenCalledWith('', { source: 'effect' });
+    });
+
+    it('BaseSelect without showSearch, onContainerBlur params is blur', () => {
+      const onSearch = jest.fn();
+      const { container } = render(
+        <BaseSelect
+          prefixCls="rc-select"
+          mode="multiple"
+          id="test"
+          displayValues={[]}
+          onDisplayValuesChange={() => {}}
+          searchValue="1"
+          showSearch={false}
+          open
+          onSearch={onSearch}
+          OptionList={OptionList}
+          emptyOptions
+        />,
+      );
+      expect(container.querySelector('div.rc-select')).toBeTruthy();
+      fireEvent.change(container.querySelector('input'), { target: { value: '2' } });
+      expect(onSearch).toHaveBeenCalledWith('2', { source: 'typing' });
+      fireEvent.blur(container.querySelector('div.rc-select'));
+      expect(onSearch).toHaveBeenCalledWith('', { source: 'blur' });
+    });
+  });
 });

tests/Select.test.tsx

@@ -605,6 +605,49 @@ describe('Select.Basic', () => {
     jest.useRealTimers();
   });
 
+  describe('should call handleSearch twice on search and blur', () => {
+    injectRunAllTimers(jest);
+
+    beforeEach(() => {
+      jest.useFakeTimers();
+    });
+
+    afterEach(() => {
+      jest.useRealTimers();
+    });
+
+    it('multiple mode should call handleSearch twice on search and blur', async () => {
+      const handleSearch = jest.fn();
+      const { container } = render(
+        <Select showSearch onSearch={handleSearch} mode="multiple">
+          <Option value="1">1</Option>
+          <Option value="2">2</Option>
+        </Select>,
+      );
+      fireEvent.change(container.querySelector('input')!, { target: { value: '1' } });
+      // 模拟失去焦点（blur）事件
+      fireEvent.blur(container.querySelector('input'));
+      jest.runAllTimers();
+      expect(handleSearch).toHaveBeenCalledTimes(2);
+      jest.useRealTimers();
+    });
+
+    it('not multiple mode should call handleSearch twice on search and blur', async () => {
+      const handleSearch = jest.fn();
+      const { container } = render(
+        <Select showSearch onSearch={handleSearch}>
+          <Option value="1">1</Option>
+          <Option value="2">2</Option>
+        </Select>,
+      );
+      fireEvent.change(container.querySelector('input')!, { target: { value: '1' } });
+      fireEvent.blur(container.querySelector('input'));
+      jest.runAllTimers();
+      expect(handleSearch).toHaveBeenCalledTimes(2);
+      jest.useRealTimers();
+    });
+  });
+
   it('should render 0 as text properly', () => {
     const data = [
       { text: 0, value: '=0' },