I raided a planet that showed the following fleet.

According to their descriptions, droids cannot be covered by FAS and the picture from probe shows they are NOT under FAS.

When I sent a fleet of ships to raid the planet thinking I would have those three sets of droids to kill NOTHING happened from them. I.E. It was a no resistance *win*
I probed the planet again after my attack and confirmed they are ALL still there. The player was and still is inactive status.
This must be a BUG since they are NOT under FAS, and they did not fight at all! I had sent ships on harvest to arrive after the battle anticipating debris from killing all of the droids not under FAS.
This was a HUGE waste of time and gas to go there.
Why are these not in fight and being destroyed when raided, when they are NOT covered under FAS as their description and the espionage probe shows?
This is a serious balance issue is these non-FAS units can survive battles, when all other non-FAS units are destroyed if a battle is lost during a planet raid.
Thanks!