Unfortunately, no new doors are opened in my case.
We're talking about the at-st hangar with 6 at-st's inside
and with the room where the ion cannons force field switch is located? So i switched it off, get back to the top, destroyed ion cannons and no new doors are opened. Especially this one
on the top of at-st hangar on the opposite side to the doors
i came from ( leading to ion cannons through the small room
with laser turret ).