Meteor/React : React Meteor Data Container update his props but his child does not

Hi, I’m kind of a beginner in Meteor and I kind of feel like this is a stupid question but I have failed to find any answer on this topic.

So my React meteor Data upload his props correctly but it’s child does not. My App component pass a state as props to a PostItList component like so :

App.js :

  constructor(props) {

    this.state = {
      activeHashTags: [],

 //Function which update the state 
  getActiveHashTags(value) {
    let newArray = this.state.activeHashTags;
      activeHashTags: newArray


render() {
    return (
        <div className="app-container">
          <div className="row">
            <PostItsList activeHashTags={this.state.activeHashTags} /> //The child component

In the PostItsList file I create a react Meteor Data Container which deal with db calls :

PostItsList.js :

export default createContainer((params) => {

  return {
    postIts: PostIts.find({}).fetch()
}, PostItsList);

The thing is, when the state of the App update, the React Meteor Data Container does too but not its child (so the PostItsList component).

So when my app is launched the intial state of the child component is ok

And after I changed my state in App.js :

It feels like the App correctely update and send the props down but the Create container does not run and thus does not upload its child props. Why is that ?

The whole app is available on github here :

Thanks a lot