diff --git a/src/SelectInput/index.tsx b/src/SelectInput/index.tsx
index 4c22a537..1cb3d558 100644
--- a/src/SelectInput/index.tsx
+++ b/src/SelectInput/index.tsx
@@ -180,13 +180,21 @@ export default React.forwardRef<SelectInputRef, SelectInputProps>(function Selec
       // so we need to mark the event directly
       (event.nativeEvent as any)._ori_target = inputDOM;
 
-      if (inputDOM && event.target !== inputDOM && !inputDOM.contains(event.target as Node)) {
+      const isClickOnInput = inputDOM === event.target || inputDOM?.contains(event.target as Node);
+
+      if (inputDOM && !isClickOnInput) {
         event.preventDefault();
       }
 
       // Check if we should prevent closing when clicking on selector
       // Don't close if: open && not multiple && (combobox mode || showSearch)
-      const shouldPreventClose = triggerOpen && !multiple && (mode === 'combobox' || showSearch);
+      const shouldPreventCloseOnSingle =
+        triggerOpen && !multiple && (mode === 'combobox' || showSearch);
+
+      // Don't close if: open && multiple && click on input
+      const shouldPreventCloseOnMultipleInput = triggerOpen && multiple && isClickOnInput;
+
+      const shouldPreventClose = shouldPreventCloseOnSingle || shouldPreventCloseOnMultipleInput;
 
       if (!(event.nativeEvent as any)._select_lazy) {
         inputRef.current?.focus();
diff --git a/tests/Multiple.test.tsx b/tests/Multiple.test.tsx
index 9a2666f9..ee76ebcf 100644
--- a/tests/Multiple.test.tsx
+++ b/tests/Multiple.test.tsx
@@ -712,5 +712,22 @@ describe('Select.Multiple', () => {
       toggleOpen(container);
       expect(container.querySelector('input')).toHaveValue('');
     });
+
+    it('should not close dropdown when mousedown on input in multiple mode (text selection)', () => {
+      const { container } = render(
+        <Select mode="multiple" showSearch options={[{ value: 'light' }]} />,
+      );
+
+      const input = container.querySelector('input') as HTMLInputElement;
+
+      // Open dropdown first
+      toggleOpen(container);
+      expectOpen(container, true);
+
+      // Start interaction from input (simulate starting text selection / cursor move)
+      fireEvent.mouseDown(input);
+
+      expectOpen(container, true);
+    });
   });
 });