Never.
When the ball first bounces it is 25+ yards away from Szczesny, so far you can't even see him in shot.
Second time it bounces it is about to land on the edge of the penalty area. Szczesny can judge by Bonucci's body language that he is probably not going to deal with it and comes flying out, but there is no way he is going to make up 12 yards before either Bonucci or Immobile. All Bonucci had to do is kick the ball into the stands as it drops.
I'd imagine even a rushing sweeper-keeper like prime Neuer or Ederson would not have ran out for that until the last minute as Tek does, because the ball is so close to Bonucci he is expected to deal with it. Especially when you know you are playing against a striker like Immobile who is mobile and will chase lost causes. It's the sort of thing I could barely tolerate from a rookie defender, Bonucci has over 500 club appearances and nearly 100 caps for Italy. Farcical.