Noticed a little bug when I enter combat with more than required Smoke Grenades for the scout drone while testing out TDS. I imagine it's because when there's more than 6 smoke grenades for one drone, which was at my base when the aliens attack, their nature is to be on the ground. However, since there is no FLOOROBJ, then the game crashes.
Or at least that's my theory
Let me explain. My base was being attacked by aliens, and I had 100 smoke bombs and one Scout Drone. The game crashed. At first I thought it was the Waspite aliens, but then I realized they were working perfectly fine, alongside the Scout Drone in regular combat. I loaded up a pre-battle save and sold all but six of the smoke bombs. The game didn't crash and the Scout Drone was there in the base.
EDIT:
They attacked the same base twice in a row and the Scout Drone had less than six smoke bombs and the game crashed. Seems as if the thing isn't suitable for Base Defence