Not sure what you mean by 'red' but i'll keep an eye out. I know all about the 'next lap no validated' message that'll popup if you go off track or hit a wall.
Shoe67Look at the timer. If you go off track or hit a wall it will be red instead of white. The lap doesn't count if it is red.
I thought it says it in your screen. Should be close to "lap is unv...."