I just wrote and article explaning the same. It's terrible and only happens in PS controller
It's impossible to drive like this, there are tracks that are clearly bug with this issue, like Bakú and Australia, i raced online so many times in this tracks and tt happened all the time, it's a garbage.
The only way to have a break it's to put the AI on the straights and It comes back... for some seconds, 1 lap at BEST...
But the more you do, the less it's gonna work the Next times, so it's just useless.
Its even that or get of the lobby, come back and pray