Impressive case you've found
From the video comment:
1) if the vehicle is next to a wall and you try to climb on it while being on the upper platform, you succeed in it by warping down to the vehicle
2) you can't walk on a vehicle, so you end up sliding
3) the vehicles still end up too close to walls making it impossible to walk around from any side
4) if you jump off the vehicle while close to a wall you launch high up in the air
5) the AI can't handle avoiding connected walls while driving, and they end up here