Solved

pitted the car on last lap

What did you try to do?
what could i do

What happened instead?
i lost the race and lost money

Did the bug happen in the app, on PC, or both?
PC

What operating system is your PC?
windows

Which browser did you experience the problem in?
microsoft edge

Can the bug be reproduced?
not sure

You didn't put enough fuel in the car

I put the fuel in the car I couldn't even use the kers I had left the game went funny

Hi Andy, I am looking at the telemetry of Singapore, for your driver Reece Thomas, who pitted at the end of lap 60.
The reason he made a pit stop was because he did not have enough fuel to complete the final lap of the race, lap 61.

Hi mate I think there's a bug with the fuel I put enough in cos I altered it myself and made sure Ihad enough lap 
I am still getting issues with fuel where it's altering itself and either putting to much or not enough in 

Your push level can affect fuel

Are you still playing using the Edge browser? I recommend trying Firefox or Chrome.

UUm play with both and my mobile will use chrome from now on cheers