+1 Issue is under investigation by Tesla engineers. It's affecting quite a few people while others have no problem. They suspect it may be due to some of the fleet changing over to winter tires that are not balanced/evenly worn (just my guess).
No issues for me either, just returned from a 500 mile road trip yesterday. 40.2.1, LR AWD, HW2.5, Pirelli Sottozero 3 snow tires. Car stays dead center in the lane except for when passing semis. Just another data point.LOL. There are NEVER any issues for you. Come drive a long weekend in LA, then report back.