Is precipitation static a concern for small drones? I read a bit about Precipitation Static buildup on the outside of aircraft flying through dust, rain, or snow.  Can this also happen on a small drone and if so, could it interfere with controlling it?

The FAA has a question on their drone certification test that addresses this and I'm curious if a small/medium size drone would be affected by this.
Static electricity buildup could affect communications. Static wicks on trailing edges of flaps, ailerons, rudder, elevator dissipate the static electricity.  I would imagine drones could be mostly fiberglass construction, so some additional details need to go into construction to provide a path for the electricity to flow, vs an all metal craft where the outer skin can be that conductor.