HW1 Classic Mission 10 Won't Complete

I kill all of the defending forces and then the research station, but the kill defending forces objective will not complete. I’ve tried waiting for the Carrier cutscene (which seems to glitch, exiting the cutscene and focusing on my resource collector of all things) to finish before engaging the defending forces, same result.

Sent proximity sensors to the outer edges of the dust. Nothing.

Anyone have any idea how to get around this?