I do agree the shot did not go off before the buzzer. But at the same time... this is one of those situations that who knows if the clock was started at the right time to begin with...
Generally, it doesn't matter if the clock is started at the exact correct time because there is enough time for a player to see the clock and must adjust to get the shot off in time. But when there's 1.6 seconds... starting the clock at the correct time becomes a big deal.
That said... did he get off the shot in 1.6 seconds after he touched it... probably not, but it's possible.