I found a new situation last night, or, it's new to me.
I tried Diablo GT again, and it's looking good in the first attampt. I caught up with the leading car, but eventually I got a 2nd because of my own mistake in the last lap.
So I tried again immediately, I thought to myself, I'd make it if I could avoid mistakes. There I went and there's no problem in driving, I also got better overall lap time. However I didn't win, but dropped to 3rd.
Tried again, still no luck, I was doing OK but the AIs seemed doing even better. I dropped to 4th. I was pretty consistent, but the gap between me and the leading car got larger and larger.
I don't remember they were like this before, I mean, doing better and better in the same line-up. Some of them still rush into the sand from time to time, but the top 2 or 3 cars remain very calm and fast, so they just pulled away.
Anyone has found this? Is it something to do with the latest update?