The beginnings of the stints dont indicate a topped up car.
People need to realize that they aren't always trying to do 'race stints'. They are testing.
I am of course, hugely grateful to have you around, to lecture us all on how this works. (Total wow-moment there when you brought it to my attention that they are testing.)
But, teams are very systematic in their approach to testing, and often stint after stint are done on the same fuel load, and the running is of course meant to be preparation for what's coming. It has to be relevant, the running they are doing. They don't fcuk around short shifting on 14' rpm. They are trying to learn about the car and tires obviously.