1º If you try to use slick tyres in wet conditions, normally, at first the car have almost normal grip as if you are using wet tyres. After that, it suddenly becomes VERY slippery (as if you were driving on ice) altough still driveable. But when it specific happens in a transition from DRY to RAIN conditions, you get a physic bug that makes your car completely undriveable as if you were racing on OIL (i mean ZERO GRIP), and you can't make it to the pits, ending your race. 2º In such transition, the AI takes the decision to change to wet tyres too late, losing a LOT of time racing with slick tyres in the wet track, altough the AI doesn't get the oil grip bug as mentioned. 3º In a triple weather transition race, many AI cars made 3 pitstops, while 2 pitstops would be enough. Do you think they will fix this broken weather transition system someday?