I actually felt it was quite harsh to penalize that, compared to what is normally waived under first lap leniency.
Sainz tried to switch back behind Verstappen, taking a very different line. He was perfectly entitled to do so, but it's not the smartest move with the entire field charging at you. If Sainz had taken a normal line, Russell's line may have been OK. So therefore I expected the stewards to let is pass without penalty as a first lap incident.