When i start up the Dreamcar championship, and it rains on Monza, Bob is the only one with raintires on the startgrid, all the others go in the pit after the first lap! Everytime it rains!
Also happens the other way round too. If you do a dry race then a wet race, they have dry tyres on. If the next rain is dry, they start with the wet tyres on. Makes for an easy win, but it's a shocking bug to have survived QA.