Clear timeouts when unmounting

src/OptionList.tsx

@@ -135,7 +135,7 @@ const OptionList: React.RefForwardingComponent<
      * `setActive` function will call root accessibility state update which makes re-render.
      * So we need to delay to let Input component trigger onChange first.
      */
-    setTimeout(() => {
+    const timeoutId = setTimeout(() => {
       if (!multiple && open && values.size === 1) {
         const value: RawValueType = Array.from(values)[0];
         const index = memoFlattenOptions.findIndex(
@@ -145,6 +145,8 @@ const OptionList: React.RefForwardingComponent<
         scrollIntoView(index);
       }
     });
+
+    return () => clearTimeout(timeoutId);
   }, [open]);
 
   // ========================== Values ==========================

src/generate.tsx

@@ -780,19 +780,33 @@ export default function generateSelector<
       }
     };
 
+    const activeTimeoutIds: number[] = [];
+    React.useEffect(() => () => {
+        activeTimeoutIds.forEach(timeoutId => clearTimeout(timeoutId));
+        activeTimeoutIds.splice(0, activeTimeoutIds.length);
+      }, []);
+
     const onInternalMouseDown: React.MouseEventHandler<HTMLDivElement> = (event, ...restArgs) => {
       const { target } = event;
       const popupElement: HTMLDivElement =
         triggerRef.current && triggerRef.current.getPopupElement();
 
       // We should give focus back to selector if clicked item is not focusable
       if (popupElement && popupElement.contains(target as HTMLElement)) {
-        setTimeout(() => {
+        const timeoutId = setTimeout(() => {
+          const index = activeTimeoutIds.indexOf(timeoutId);
+          if (index !== -1) {
+            activeTimeoutIds.splice(index, 1);
+          }
+
           cancelSetMockFocused();
+
           if (!popupElement.contains(document.activeElement)) {
             selectorRef.current.focus();
           }
         });
+
+        activeTimeoutIds.push(timeoutId);
       }
 
       if (onMouseDown) {