For this race, I don't have the replay bug and at least for a few cars, including George's, the throttle looks correctly!
However the throttle definitely has a little issue I think:
View attachment 502847
A few meters later:
View attachment 502848
And another few meters later:
View attachment 502849
It's subtle, but the throttle definitely goes from 99-100% a little bit down to like 95-98%.
It's happening throughout all laps.
Although you really need to have a look at your throttle input, your top speed didn't look unusually bad.
Bart was going 270 km/h down the main straight, you were going about 267 km/h.
That might be down to either setup or your throttle issue.
The McLaren is just really slow at Monza and lots of people either put 0 wing in their cars or just had faster cars. Lots of Nissans. They have McLarens for breakfast around Monza, sadly...
Anyway, here's Pattrick's throttle:
View attachment 502858
Here's another fluctuation of your throttle:
Exit of Ascari
View attachment 502860
View attachment 502861
View attachment 502862
The binary brake trace only happens for other cars, yes. I'm not sure right now about the throttle... I'll try to check!