Doing the Collateral Damage mission with the borg and undine. I'm at the part where you have to escort the escape shuttles to safety. I've destroyed the borg sphere and the two other borg ships, but no other ships appear. I've flow around the entire map and sat there with the shuttles and nothing happens. I've logged out and re-tried it and all with the same result every time. What am I missing? Is this bugged? Seems like something else is supposed to spawn.