Thank you all for upvoting. The team has discussed this topic internally and I’m moving it from Report New Issues to Will Not Fix:
Drivatars, like any human, might sporadically have control issues with some cars which can cause them to drive erratically under some circumstances, which can be exacerbated by having other cars nearby which they are trying to avoid. As such, they might accidentally swerve into other players due to poor control. Due to the very low reproduction rate, the non-deliberate nature of this behaviour, and the risks associated with updating any particular Drivatar behaviour, we are not planning to make any changes to Drivatar driving behaviour at this stage.