I've seen that my drivers tend to be quicker the more we advance in the race.
I would have expected the opposite due to the driver getting tired and the car wearing down. So I run a test to verify this strange behaviour and here are the results :

With constant push level all along the race I get constant tyre wear and fuel consumption.
But every stint the driver is quicker and quicker which is a bit odd especialy with a low stamina driver (ST=2 BMI=28.4)
Is it an expected behaviour or a bug ?
And if expected what would be the reason behind that ?