You can see that the car drives itself into the final limits if you check the 3 digit mode/region/direction capture on service tool. That software fix was sent out to MOST of the jobs by now, it was 15ish years ago i think when that came about. Cetek is gonna rape you for it if you're a competitor of Kone. Take vaseline

Heard about a balance issue, as i think Montgomery had those at 40% from factory, but i swear that every time i took a call on the mysterious final, the direction was driving towards the terminal.

It could be a ton of different things really. Brake panel and M contactor aux's are a common start. Could be a pilot relay in drive, a sloppy encoder, a door lock bounce, etc. Gotta have tool to watch IO's to figure out