Fix: avoid error to get exist sibling.

[wssgcg1213]

Error case:

function Foo(props) {
  return (
    <View className="container">
      <div x-slot:content>
        <Inviter foo="bar">
          <div x-slot:extra>{props.foo}</div>
        </Inviter>

        <View>1</View>
        <View x-if={props.condition}>2</View>
        <View>3</View>
      </div>
    </View>
  )
}