Can be reproduced very easily in the editor:
- place a character and name it unit
- place an objet (computer, rock, car, anything)
- make the character move with
```
unit playAction "walkF";
```
The character will play the animation and the motion vector and the character will also collide with objects.*
- now attach the object to the character
```
object attachTo [unit, [0,0,2]]
```
- try to make the unit move with playAction again
The unit will play the animation but the motion vector will not be played.
If you use disableAI "MOVE" or disableAI "ANIM", the motion vector will be played but unfortunately there will be no more collisions with other objects
https://www.youtube.com/watch?v=ScDzOJ0W18c