Practice project Jammming - cannot reset the new playlist title on save

Hi everybody!

I am currently working on the jammming practice project, where you create a webapp with React.js and the spotify API to make playlists and save them to your account. I am almost done but for one little detail that for the life of me I can’t seem to fix.
When I save the playlist, I want the playlist title to reset to ‘New Playlist’, but it won’t. I am using setState to do this, and the weird thing is that I am also using setState to return an empty array for the actual songs in the playlists, and they reset just fine.

A summarized version of the code, including the savePlaylist function is this:

class App extends React.Component {
  constructor(props) {
    super(props);

    this.state = {
      searchResults: [],

      playlistName: 'My Playlist',

      playlistTracks: []
    };
    this.addTrack = this.addTrack.bind(this);
    this.removeTrack = this.removeTrack.bind(this);
    this.updatePlaylistName = this.updatePlaylistName.bind(this);
    this.savePlaylist = this.savePlaylist.bind(this);
    this.search = this.search.bind(this);
  }

  savePlaylist() {
    const trackURIs = [];
    this.state.playlistTracks.forEach(track => {
      let trackURI;
      trackURI = `spotify:track:${track.id}`;
      trackURIs.push(trackURI);
    });
    Spotify.savePlaylist(this.state.playlistName, trackURIs).then(() => {
      this.updatePlaylistName('New Playlist');
      this.setState({
        playlistTracks: [],
        playlistName: 'New Playlist'
      })
    })

  }

  render() {
    return (
      <div>
        <h1>Ja<span className="highlight">mmm</span>ing</h1>
        <div className="App">
          <SearchBar onSearch={this.search} />
          <div className="App-playlist">
            <SearchResults searchResults={this.state.searchResults} onAdd={this.addTrack} />
            <Playlist playlistName={this.state.playlistName} playlistTracks={this.state.playlistTracks} onRemove={this.removeTrack} onNameChange={this.updatePlaylistName} onSave={this.savePlaylist} />
          </div>
        </div>
      </div>
    )
  }
}

Any help is welcome!