Not completely sure what's going on, but I suspect somewhere in the check to make sure drones only deploy for jobs they can path to, it fails to check if there are enough drones to deploy, because I started with 3 or 4 drones, made half a dozen more, then a few hours later, I have... about a hundred?

Oh, slight clarification--I only just updated this morning, finished finals yesterday, and previously I had been steadily losing drones to biters, but now I'm literally drowning in them, and swarms of them appear out thin air when I order a large construction job. I do like the little swarm they make around you when your inventory is full though.

Ah right, I didn't take that into account

I'm having the same issue, started with 10, have 26, didn't craft any. Cute little buggers.