diff --git a/packages/kit-headless/src/components/combobox/combobox-item.tsx b/packages/kit-headless/src/components/combobox/combobox-item.tsx
index 7c5bad38b..90bfd71d4 100644
--- a/packages/kit-headless/src/components/combobox/combobox-item.tsx
+++ b/packages/kit-headless/src/components/combobox/combobox-item.tsx
@@ -141,7 +141,7 @@ export const HComboboxItem = component$((props: HComboboxItemProps) => {
 
       const observer = new IntersectionObserver(checkVisibility$, {
         root: context.panelRef.value,
-        threshold: 1.0,
+        threshold: 0,
       });
 
       cleanup(() => observer?.disconnect());
diff --git a/packages/kit-headless/src/components/select/select-item.tsx b/packages/kit-headless/src/components/select/select-item.tsx
index 431064ad8..b880ae1f6 100644
--- a/packages/kit-headless/src/components/select/select-item.tsx
+++ b/packages/kit-headless/src/components/select/select-item.tsx
@@ -119,7 +119,7 @@ export const HSelectItem = component$<SelectItemProps>((props) => {
 
       const observer = new IntersectionObserver(checkVisibility$, {
         root: context.popoverRef.value,
-        threshold: 1.0,
+        threshold: 0,
       });
 
       cleanup(() => observer?.disconnect());