Yoda Is Your Father said:
What about that idiot who decided not to fire on the escape pod because it didn’t contain life signs? Were they trying to save ammo or something? In a world where artificially intelligent droids are commonplace… fire on the damn escape pod!
“There goes another one”.
The presumption was that they had fired on other escape pods and it wasn’t worth the hassle anymore. How many escape pods went off? Three? Fifty? We don’t know, but if there were a ton of them and none of them had lifeforms on board, it’s not a stretch to imagine the officers would tire of worrying about them.