*Makes mental note* So they must make repairs in... Hyperspace!
It has all become clear now!
They don't have enough Palpatine approved viewing materials on those ISDs, so they put those crews to work repairing the ships while in hyperspace! What's the matter Colonel Sanders? Chicken of working outside the ship while in hyperspace??! Never fear, we have a whole army of astromech driods to do the dirty work! What do you mean they left? Restraining bolts found in the toilet!? *begins force choke*