Update create.tsx

src/teacher/video-class/create.tsx

@@ -127,7 +127,7 @@ export default defineComponent({
       <div class={styles['video-create']}>
         {createState.active <= 2 ? (
           <Sticky position="top" offsetTop={0} zIndex={999999}>
-            <ColHeader border={false} />
+            <ColHeader border={false} isFixed={false} />
             <Grid
               border={false}
               style={{ paddingTop: '15px' }}