React push random number into array not working

JavaScript
1 
  shuffle() {
    for(var i = 0; i < 3; i++) {
      this.shuffleCard();
    }
}

  shuffleCard() {
    const rand = array[Math.floor(array.length * Math.random())]
    if(this.state.computer.length < 2) {
      console.log(rand);
      this.setState({
        computer: [...this.state.computer, rand]
      }, () => console.log(this.state.computer));
    } else {
      this.setState({
        player: [...this.state.player, rand]
      }, () => console.log(this.state.computer));
    }    
    document.getElementById('shuffleButton').setAttribute('disabled', '');
  }

In this code it will only push the lastest generated number and push it to this.state.computer. Why it wouldn’t push the first two numbers? And more importantly what should I do to solve this problem.