More importantly, what would've happened if Spurs had scored between the pen incident and the VAR decision being made 2 mins later? Go back to the first offence I assume and disallow the Spurs goal. Imagine the stadium! Would the VAR officials still be objective if that happened or would they be more inclined not give the penalty because of the Spurs goal? Tough one.
You can see the game being stopped soon when there's an incident in case of a goal being scored whilst the decision making process is happening. In the same way you can see penalties restarting with a goal kick of they're missed because of the encroachment issues etc.
I am for VAR, but my concern is that the game will fundamentally change due to VAR and the current remit which is for law changes to suit referees at the top level and not the game. The new handball rule for instance, appears to be there to protect against controversial decisions (ball hitting the arm and either going straight in or creating a GSO). This change is from the Boly goal against City last year I believe which went in off the arm. But the law change has made things much worse, not better, because the number of times the ball goes in direct from the arm/hand is far less than the amount of times in touches the arm/hand before a goal is scored. It's safe refereeing which in turn worsens the game as a spectacle.