Apologies if this is a known issue already, tried searching and nothing showed up.
So, this has been in a while I have noticed. When a ship overheats, all things docked upwards from it are frozen in place, but, become Phantom-like and weapons pass through it with no damage. However, AI Will select these parts as an enemy, and continue to fire at it to no avail. This means its possible to create exploitable "Decoys" provided the docks arent destroyed before the main part has finished overheating.
The only way to target them is to enable the appropriate docked entity marker in the Nav menu, and select them and Admin delete them. The other is to unload and reload the sector, something that isnt possible with Jump-Inhibited PvP.