If the T6/7 didnt have a ship image, then it would make perfect sense. No Image ? Go to Default behaviour. However, they do, it seems that only at a station does the behaviour change for a limited number of ships. Not making any sense to me yet.
If it's only transporters this behavior might be related to:
- the cargo hold space. A big, empty, hold could act like a resonance room that somehow affects UA's scanning lock. or, along the lines of cosmic sex theory, maybe it resembles an UA mother ?
- the fact that they are not combat vessels and thus not interesting