I guess it’s to tangle / stop the drone from getting too close
Spaced armor and slat armor are also designed to defend against HEAT rounds, protecting vehicles by causing premature detonation of the explosive at a relatively safe distance away from the main armor of the vehicle.
https://en.m.wikipedia.org/wiki/High-explosive_anti-tank#Defense
The UI on the app is really disingenuous, it looks like there is no option to change until you click on the individual descriptions.