It's not just assualt transports. I have had this happen with other ships too. Auto-kiting sometimes seems to bug out for some reason.
It seems more likely to happen if the target has radar dampening, but I think I have seen it even when it no radar dampening is involved.
Maybe certain ranges or angles tend to trigger the bug more often, IDK. I've never been able to reproduce it reliably.
It may not be JUST Assault Transports but it's ESPECIALLY Assault Transports..
..look at this guy in that screenshot..
It just sits there and doesn't do anything. It doesn't shoot unless I manually move it closer and order it to shoot.. and after that it returns to the "max range".. which is apparently..
more than it's max range.. and it doesn't do anything again. I have to manually keep clicking move shoot move shoot move shoot move shoot or it just sits there till the end of time.
EDIT:This seems to happen
specifically when attacking Raid Engines though this
does sometimes happen vs other targets too. But specifically Raid Engines. Targets that stay still.. aka usually buildings/structures.. are the ones causing this problem.