BotFramework-WebChat: Timed out while waiting for activity

Screenshots

Version

WebChat 4.11.0

Describe the bug

Webchat times out and shows a waring message under the browser console for the first welcome message. Due to timed out it takes some time to show the welcome message. It appears the reply to message has a wrong id or none existent ID. This happens in the latest version of webchat v4.11.0 but I believe it happens in the previous v4.10.1 without logging in the consol.

Expected behavior

WebChat should not timed out for the initial welcome message.

Code to trigger the welcome message

    if ('DIRECT_LINE/CONNECT_FULFILLED'.equalsTo(action.type)) {
      // When we receive DIRECT_LINE/CONNECT_FULFILLED action, we will send an event activity using WEB_CHAT/SEND_EVENT
      this.directLine.postActivity({
        from: { id: this.user.id, name: this.user.name },
        name: 'webchat/join',
        type: 'event',
        value: 'token'
      }).subscribe(
        id => console.log(`Posted activity, assigned ID ${id}`),
        error => console.log(`Error posting activity ${error}`)
      );
    }