A few other problems:
Robots can attack from their spawn.
The robots deployed their bomb, yet the round kept going.
One of the robot icons is a purple checkerboard.
Got stuck on wave 6 because I couldn't find the last 2 scouts. I suspect they never spawned.
Same with wave 7, these guys never spawned and the wave went on forever.
The trigger volume for the warning alarm when the bomb gets close to the hatch is awfully small.
Oh, and ignore the boxes all over the ground in the screenshots. I had the nav editor on.